Socioeconomic status

An 1880 painting by Jean-Eugène Buland showing a stark contrast in socioeconomic status

Socioeconomic status (SES) is an economic and sociological combined total measure of a person's work experience and of an individual's or family's economic and social position in relation to others, based on income, education, and occupation. When analyzing a family's SES, the household income, earners' education, and occupation are examined, as well as combined income, versus with an individual, when their own attributes are assessed. Or more commonly known to depict an economic difference in society as a whole.[1]

Socioeconomic status is typically broken into three categories (high SES, middle SES, and low SES) to describe the three areas a family or an individual may fall into. When placing a family or individual into one of these categories, any or all of the three variables (income, education, and occupation) can be assessed.

Additionally, low income and education have been shown to be strong predictors of a range of physical and mental health problems, including respiratory viruses, arthritis, coronary disease, and schizophrenia. These problems may be due to environmental conditions in their workplace, or, in the case of mental illnesses, may be the entire cause of that person's social predicament to begin with.[2][3][4]

Education in higher socioeconomic families is typically stressed as much more important, both within the household as well as the local community. In poorer areas, where food and safety are priority, education can take a backseat. Youth audiences are particularly at risk for many health and social problems in the United States, such as unwanted pregnancies, drug abuse, and obesity.[5]

Main factors

Income

Income refers to wages, salaries, profits, rents, and any flow of earnings received. Income can also come in the form of unemployment or workers compensation, social security, pensions, interests or dividends, royalties, trusts, alimony, or other governmental, public, or family financial assistance.

Income can be looked at in two terms, relative and absolute. Absolute income, as theorized by economist John Maynard Keynes, is the relationship in which as income increases, so will consumption, but not at the same rate.[6] Relative income dictates a person or family’s savings and consumption based on the family’s income in relation to others. Income is a commonly used measure of SES because it is relatively easy to figure for most individuals.

Income inequality is most commonly measured around the world by the Gini coefficient, where 0 corresponds to perfect equality and 1 means perfect inequality. Low income families focus on meeting immediate needs and do not accumulate wealth that could be passed on to future generations, thus increasing inequality. Families with higher and expendable income can accumulate wealth and focus on meeting immediate needs while being able to consume and enjoy luxuries and weather crises.[7]

Education

Education also plays a role in income. Median earnings increase with each level of education. As conveyed in the chart, the highest degrees, professional and doctoral degrees, make the highest weekly earnings while those without a high school diploma earn less. Higher levels of education are associated with better economic and psychological outcomes (i.e.: more income, more control, and greater social support and networking).[8]

Education plays a major role in skill sets for acquiring jobs, as well as specific qualities that stratify people with higher SES from lower SES. Annette Lareau speaks on the idea of concerted cultivation, where middle class parents take an active role in their children’s education and development by using controlled organized activities and fostering a sense of entitlement through encouraged discussion. Laureau argues that families with lower income do not participate in this movement, causing their children to have a sense of constraint. An interesting observation that studies have noted is that parents from lower SES households are more likely to give orders to their children in their interactions while parents with a higher SES are more likely to interact and play with their children. A division in education attainment is thus born out of these two differences in child rearing. Research has shown how children who are born in lower SES households have weaker language skills compared to children raised in higher SES households. These language skills affect their abilities to learn and thus exacerbate the problem of education disparity between low and high SES neighborhoods. Lower income families can have children who do not succeed to the levels of the middle income children, who can have a greater sense of entitlement, be more argumentative, or be better prepared for adult life.[9]

Research shows that lower SES students have lower and slower academic achievement as compared with students of higher SES.[10] When teachers make judgments about students based on their class and SES, they are taking the first step in preventing students from having an equal opportunity for academic achievement. Educators need to help overcome the stigma of poverty. A student of low SES and low self-esteem should not be reinforced by educators. Teachers need to view students as individuals and not as a member of an SES group. Teachers looking at students in this manner will help them to not be prejudiced towards students of certain SES groups.[11] Raising the level of instruction can help to create equality in student achievement. Teachers relating the content taught to students' prior knowledge and relating it to real world experiences can improve achievement.[12] Educators also need to be open and discuss class and SES differences. It is important that all are educated, understand, and be able to speak openly about SES.[13]

Occupation

Occupational prestige, as one component of SES, encompasses both income and educational attainment. Occupational status reflects the educational attainment required to obtain the job and income levels that vary with different jobs and within ranks of occupations. Additionally, it shows achievement in skills required for the job. Occupational status measures social position by describing job characteristics, decision making ability and control, and psychological demands on the job.

Occupations are ranked by the Census (among other organizations) and opinion polls from the general population are surveyed. Some of the most prestigious occupations are physicians and surgeons, lawyers, chemical and biomedical engineers, university professors, and communications analysts. These jobs, considered to be grouped in the high SES classification, provide more challenging work and greater control over working conditions but require more ability. The jobs with lower rankings include food preparation workers, counter attendants, bartenders and helpers, dishwashers, janitors, maids and housekeepers, vehicle cleaners, and parking lot attendants. The jobs that are less valued also offer significantly lower wages, and often are more laborious, very hazardous, and provide less autonomy.[8][14]

Occupation is the most difficult factor to measure because so many exist, and there are so many competing scales. Many scales rank occupations based on the level of skill involved, from unskilled to skilled manual labor to professional, or use a combined measure using the education level needed and income involved.

In sum, the majority of researchers agree that income, education and occupation together best represent SES, while some others feel that changes in family structure should also be considered.[15] With the definition of SES more clearly defined, it is now important to discuss the effects of SES on students' cognitive abilities and academic success.[15] Several researchers have found that SES affects students' abilities.[15]

Other variables

Wealth

Wealth distribution in the United States by net worth (2007).[16] The net wealth of many people in the lowest 20% is negative because of debt.[16] By 2014 the wealth gap deepened.

  Top 1% (34.6%)
  Next 4% (27.3%)
  Next 5% (11.2%)
  Next 10% (12%)
  Upper Middle 20% (10.9%)
  Middle 20% (4%)
  Bottom 40% (0.2%)

Wealth, a set of economic reserves or assets, presents a source of security providing a measure of a household's ability to meet emergencies, absorb economic shocks, or provide the means to live comfortably. Wealth reflects intergenerational transitions as well as accumulation of income and savings.[8][17]

Income, age, marital status, family size, religion, occupation, and education are all predictors for wealth attainment.

The wealth gap, like income inequality, is very large in the United States. There exists a racial wealth gap due in part to income disparities and differences in achievement resulting from institutional discrimination. According to Thomas Shapiro, differences in savings (due to different rates of incomes), inheritance factors, and discrimination in the housing market lead to the racial wealth gap. Shapiro claims that savings increase with increasing income, but African Americans cannot participate in this, because they make significantly less than whites. Additionally, rates of inheritance dramatically differ between African Americans and whites. The amount a person inherits, either during a lifetime or after death, can create different starting points between two different individuals or families. These different starting points also factor into housing, education, and employment discrimination. A third reason Shapiro offers for the racial wealth gap are the various discriminations African Americans must face, like redlining and higher interest rates in the housing market. These types of discrimination feed into the other reasons why African Americans end up having different starting points and therefore fewer assets.[18]

Effects

Health

Recently, there has been increasing interest from epidemiologists on the subject of economic inequality and its relation to the health of populations. Socioeconomic status is an important source of health inequity, as there is a very robust positive correlation between socioeconomic status and health. This correlation suggests that it is not only the poor who tend to be sick when everyone else is healthy, but that there is a continual gradient, from the top to the bottom of the socio-economic ladder, relating status to health. Parents with a low socioeconomic status cannot afford many of the health care resources which is the reason that their children may have a more advanced illness because of the lack of treatment.[19] This phenomenon is often called the "SES Gradient" or according to the World Health Organisation the "Social Gradient". Lower socioeconomic status has been linked to chronic stress, heart disease, ulcers, type 2 diabetes, rheumatoid arthritis, certain types of cancer, and premature aging.

There is debate regarding the cause of the SES Gradient. A number of researchers (A. Leigh, C. Jencks, A. Clarkwest—see also Russell Sage working papers) see a definite link between economic status and mortality due to the greater economic resources of the wealthy, but they find little correlation due to social status differences.

Other researchers such as Richard G. Wilkinson, J. Lynch, and G.A. Kaplan have found that socioeconomic status strongly affects health even when controlling for economic resources and access to health care.[20] Most famous for linking social status with health are the Whitehall studies—a series of studies conducted on civil servants in London. The studies found that although all civil servants in England have the same access to health care, there was a strong correlation between social status and health. The studies found that this relationship remained strong even when controlling for health-affecting habits such as exercise, smoking and drinking. Furthermore, it has been noted that no amount of medical attention will help decrease the likelihood of someone getting type 2 diabetes or rheumatoid arthritis—yet both more common among populations with lower socioeconomic status. there is no significant relationship between SES and stress during pregnancy, while there is a significant relationship between husband's occupational status[21] Also, there is not significant relationship between income and mother's education and the rate of pregnancy stress[21]

Political participation

Political scientists have established a consistent relationship between SES and political participation.

Psychological

Language development

Home environment

The environment of low SES children is characterized by less dialogue from parents, minimal amounts of book reading, and few instances of joint attention, the shared focus of the child and adult on the same object or event, when compared to the environment of high SES children. In contrast, infants from high SES families experience more child-directed speech. At 10 months, children of high SES hear on average 400 more words than their low SES peers.[22]

Language ability differs sharply as a function of SES, for example, the average vocabulary size of 3-year-old children from professional families was more than twice as large as for those on welfare.[23]

Children from lower income households had greater media access in their bedrooms but lower access to portable play equipment compared to higher income children.[24] This eventually leads children from lower socioeconomic backgrounds to be at a disadvantage when comparing them with their counterparts in terms of access to physical activities.

Parental interactions

In addition to the amount of language input from parents, SES heavily influences the type of parenting style a family chooses to practice. These different parenting styles shape the tone and purpose of verbal interactions between parent and child. For example, parents of high SES tend toward more authoritative or permissive parenting styles.[25] These parents pose more open-ended questions to their children to encourage the latter’s speech growth.[26] In contrast, parents of low SES tend toward more authoritarian styles of address. Their conversations with their children contain more imperatives and yes/no questions that inhibits child responses and speech development.[26]

Parental differences in addressing children may be traced to the position of their respective groups within society. Working class individuals often hold low power, subordinate positions in the occupational world. This standing in the social hierarchy requires a personality and interaction style that is relational and capable of adjusting to circumstances.[27] An authoritarian style of address prepares children for these types of roles, which require a more accommodating and compliant personality. Therefore, low SES parents see the family as more hierarchical, with the parents at the top of the power structure, which shapes verbal interaction.[28] This power differential emulates the circumstances of the working class world, where individuals are ranked and discouraged from questioning authority.

Conversely, high SES individuals occupy high power positions that call for greater expressivity. High SES parents encourage their children to question the world around them.[27] In addition to asking their children more questions, these parents push their children to create questions of their own.[25] In contrast with low SES parents, these individuals often view the power disparity between parent and child as detrimental to the family. Opting instead to treat children as equals, high SES conversations are characterized by a give and take between parent and child.[28] These interactions help prepare these children for occupations that require greater expressivity.

Disparities in language acquisition

The linguistic environment of low and high SES children differs substantially, which affects many aspects of language and literacy development such as semantics, syntax, morphology, and phonology.

Semantics

Semantics is the study of the meaning of words and phrases. Semantics covers vocabulary, which is affected by SES. Children of high SES have larger expressive vocabularies by the age of 24 months due to more efficient processing of familiar words. By age 3, there are significant differences in the amount of dialogue and vocabulary growth between children of low and high SES.[29] A lack of joint attention in children contributes to poor vocabulary growth when compared to their high SES peers. Joint attention and book reading are important factors that affect children’s vocabulary growth.[30] With joint attention, a child and adult can focus on the same object, allowing the child to map out words. For example, a child sees an animal running outside and the mom points to it and says, "Look, a dog." The child will focus its attention to where its mother is pointing and map the word dog to the pointed animal. Joint attention thus facilitates word learning for children.

Syntax

Syntax refers to the arrangement of words and phrases to form sentences. SES affects the production of sentence structures. Although 22- to 44-month-old children’s production of simple sentence structures does not vary by SES, low SES does contribute to difficulty with complex sentence structures. Complex sentences include sentences that have more than one verb phrase. An example of a complex sentence is, "I want you to sit there".[31] The emergence of simple sentence structures is seen as a structure that is obligatory in everyday speech. Complex sentence structures are optional and can only be mastered if the environment fosters its development.[31]

This lag in the sentence formation abilities of low SES children may be caused by less frequent exposure to complex syntax through parental speech. Low SES parents ask fewer response-coaxing questions of their children which limits the opportunities of these children to practice more complex speech patterns.[25] Instead, these parents give their children more direct orders, which has been found to negatively influence the acquisition of more difficult noun and verb phrases.[26] In contrast, high SES households ask their children broad questions to cultivate speech development. Exposure to more questions positively contributes to children’s vocabulary growth and complex noun phrase constructions.[26]

Morphology

Children’s grasp of morphology, the study of how words are formed, is affected by SES. Children of high SES have advantages in applying grammatical rules, such as the pluralization of nouns and adjectives compared to children of low SES. Pluralizing nouns consists of understanding that some nouns are regular and -s denotes more than one, but also understanding how to apply different rules to irregular nouns. Learning and understanding how to use plural rules is an important tool in conversation and writing. In order to communicate successfully that there is more than one dog running down the street, an -s must be added to dog. Research also finds that the gap in ability to pluralize nouns and adjectives does not diminish by age or schooling because low SES children’s reaction times to pluralize nouns and adjectives do not decrease.[32]

Phonology

Phonological awareness, the ability to recognize that words are made up different sound units, is also affected by SES. Children of low SES between the second and sixth grades are found to have low phonological awareness. The gap in phonological awareness increases by grade level.[33] This gap is even more problematic if children of low SES are already born with low levels of phonological awareness and their environment does not foster its growth. Children who are have high phonological awareness from an early age are not affected by SES.[34]

Positive outcomes of low SES

Given the large amount of research on the set backs children of low SES face, there is a push by child developmental researchers to steer research to a more positive direction regarding low SES. The goal is to highlight the strengths and assets low income families possess in raising children. For example, African American preschoolers of low SES exhibit strengths in oral narrative, or storytelling, that may promote later success in reading. These children have better narrative comprehension when compared to peers of higher SES.[35]

Literacy development

A gap in reading growth exists between low SES and high SES children, which widens as children move on to higher grades. Reading assessments that test reading growth include measures on basic reading skills (i.e., print familiarity, letter recognition, beginning and ending sounds, rhyming sounds, word recognition), vocabulary (receptive vocabulary), and reading comprehension skills (i.e., listening comprehension, words in context).[36] The reading growth gap is apparent between the spring of kindergarten and the spring of first-grade, the time when children rely more on the school for reading growth and less on their parents. Initially, high SES children begin as better readers than their low SES counterparts. As children get older, high SES children progress more rapidly in reading growth rates than low SES children. These early reading outcomes affect later academic success. The further children fall behind, the more difficult it is to catch up and the more likely they will continue to fall behind. By the time students enter high school in the United States, low SES children are considerably behind their high SES peers in reading growth.[37]

Home environment

Home environment is one of the leading factors of a child's well being. Children living in a poor home with inadequate living conditions are more likely to be immune to illness and injuries.[19] The disparities in experiences in the home environment children of high and low SES affect reading outcomes. The home environment is considered the main contributor to SES reading outcomes.[37] Children of low SES status are read to less often and have fewer books in the home than their high SES peers, which suggests an answer to why children of low SES status have lower initial reading scores than their high SES counterparts upon entering kindergarten.[37] <ref name= "Evans, 2004). Low SES parents are also less involved in their children’s schooling.[38]

The home environment makes the largest contribution to the prediction of initial kindergarten reading disparities. Characteristics of the home environment include home literacy environment and parental involvement in school. Home literacy environment is characterized by the frequency with which parents engage in joint book reading with the child, the frequency with which children read books outside of school, and the frequency with which household members visited the library with the child. Parental involvement in school is characterized by attending a parent–teacher conference, attending a parent–teacher association (PTA) meeting, attending an open house, volunteering, participating in fundraising, and attending a school event. Resources, experiences, and relationships associated with the family are most closely associated with reading gaps when students reading levels are first assessed in kindergarten. The influence of family factors on initial reading level may be due to children experiencing little schooling before kindergarten—they mainly have their families to rely on their reading growth.[37]

Family SES is also associated with reading achievement growth during the summer. Students from high SES families continue to grow in their ability to read after kindergarten and students from low SES families fall behind in their reading growth at a comparable amount. Additionally, the summer setback disproportionately affects African American and Hispanic students because they are more likely than White students to come from low SES families. Also, low SES families typically lack the appropriate resources to continue reading growth when school is not in session.[36]

Neighborhood influence

The neighborhood setting in which children grow up in contributes to reading disparities between low and high SES children. These neighborhood qualities include but are not limited to garbage or litter in the street, individuals selling or using drugs in the street, burglary or robbery in the area, violent crime in the area, vacant homes in the area, and how safe it is to play in the neighborhood. Low SES children are more likely to grow up in such neighborhood conditions than their high SES peers. Community support for the school and poor physical conditions surrounding the school are also associated with children’s reading. Neighborhood factors help explain the variation in reading scores in school entry, and especially as children move on to higher grades. As low SES children in poor neighborhood environments get older, they fall further behind their high SES peers in reading growth and thus have a more difficult time developing reading skills at grade level.[37]

In a study by M. Keels, it was determined that when low-income families are moved from poor neighborhoods to suburban neighborhoods, there are reductions in delinquency in children.[39] When comparing different social statuses of families, the environment of a neighborhood turns out to be major factor in contributing to the growth of a child.

School influence

School characteristics, including characteristics of peers and teachers, contribute to reading disparities between low and high SES children. For instance, peers play a role in influencing early reading proficiency. In low SES schools, there are higher concentrations of less skilled, lower SES, and minority peers who have lower gains in reading. The number of children reading below grade and the presence of low-income peers were consistently associated with initial achievement and growth rates. Low SES peers tend to have limited skills and fewer economic resources than high SES children, which makes it difficult for children to grow in their reading ability. The most rapid growth of reading ability happens between the spring of kindergarten and the spring of first grade. Teacher experience (number of years teaching at a particular school and the number of years teaching a particular grade level), teacher preparation to teach (based on the number of courses taken on early education, elementary education, and child development), the highest degree earned, and the number of courses taken on teaching reading all determine whether or not a reading teacher is qualified. Low SES students are more likely to have less qualified teachers, which is associated with their reading growth rates being significantly lower than the growth rates of their high SES counterparts.[37]

Influences on nonverbal behavior

Michael Kraus and Dacher Keltner, in their study published in the December 2008 issue of Psychological Science, found that children of parents with a high SES tended to express more disengagement behaviors than their peers of low SES. In this context, disengagement behaviors included self-grooming, fidgeting with nearby objects, and doodling while being addressed. In contrast, engagement behaviors included head nods, eyebrow raises, laughter and gazes at one’s partner. These cues indicated an interest in one’s partner and the desire to deepen and enhance the relationship. Participants of low SES tended to express more engagement behaviors toward their conversational partners, while their high SES counterparts displayed more disengagement behaviors. Authors hypothesized that, as SES rises, the capacity to fulfill one’s needs also increases. This may lead to greater feelings of independence, making individuals of high SES less inclined to gain rapport with conversational partners because they are less likely to need their assistance in the future.[40]

See also

References

  1. ↑ National Center for Educational Statistics. 31 March 2008. http://nces.ed.gov/programs/coe/glossary/s.asp
  2. ↑ Erica Goode. 13 April. "For Good Health, it Helps to be Rich and important." New York Times http://query.nytimes.com/gst/fullpage.html?res=9806E5DA1230F932A35755C0A96F958260&sec=&spon=&pagewanted=1
  3. ↑ Marmot, Michael. 2004. The Status Syndrome: How Social Standing Affects Our Health and Longevity. New York: Owl Books.
  4. ↑ Werner, Shirli, Malaspina, Dolores, and Rabinowitz, Jonathan. Socioeconomic Status at Birth is Associated with Risk of Schizophrenia: Population-Based Multilevel Study. Schizophrenia Bulletin. 18 April 2007.
  5. ↑ Hunt, J (4 October 1972). Early Education and Social Class. doi:10.1037/h0082195
  6. ↑ Wisdom Supreme. 6 April 2008. http://www.wisdomsupreme.com/dictionary/absolute-income-hypothesis.php
  7. ↑ Boushey, Heather and Weller, Christian. (2005). Inequality Matters: The Growing Economic Divide in America and its Poisonous Consequences.. "What the Numbers Tell Us." Pp 27-40. Demos.
  8. 1 2 3
  9. ↑ Lareau, Annette. (2003). Unequal Childhoods: Race, Class, and Family Life. University of California Press
  10. ↑ American Psychological Association. (2012). ''Education & Socioeconomic Status. Retrieved from http://www.apa.org/pi/ses/resources/publications/factsheet-education.aspx.
  11. ↑ Gollnick, Chinn. (2013). Multicultural Education in a Pluralistic Society.
  12. ↑ Gollnick,Chinn. (2013). Multicultural Education in a Pluralistic Society.
  13. ↑ Stanek. (2012). Talking About Class.
  14. ↑ Scott, Janny and Leonhardt, David. "Class Matters: A Special Edition." New York Times 14 May 2005. http://www.nytimes.com/2005/05/14/national/class/15MOBILITY-WEB.html
  15. 1 2 3 Milne, A., & Plourde, L. A. (2006). Factors of a Low-SES Household: What Aids Academic Achievement?
  16. 1 2 Recent Trends in Household Wealth in the United States: Rising Debt and the Middle-Class Squeeze—an Update to 2007 by Edward N. Wolff, Levy Economics Institute of Bard College, March 2010
  17. ↑ MacArthur Research Network on SES and Health. 31 March 2008. http://www.macses.ucsf.edu/Research/Social%20Environment/chapters.html
  18. ↑ Shapiro, Thomas. (2004). The Hidden Cost of Being African American: How Wealth Perpetuates Inequality. Oxford University Press.
  19. 1 2 Bradley, Robert. "Socioeconomic Status and Child Development". Annual Review of Psychology. 53.
  20. ↑ Wilkinson, Richard; Pickett, Kate (2009). The Spirit Level: Why More Equal Societies Almost Always Do Better. Allen Lane. p. 352. ISBN 978-1-84614-039-6.
  21. 1 2 Shishehgar, Sara; Dolatian, Mahrokh; Alavi Majd, Hamid; Bakhtiary, Maryam (2014). "Socioeconomic Status and Stress Rate during Pregnancy in Iran". Global Journal of Health Science. 6 (4).
  22. ↑ Hart, Betty (1995). Meaningful Differences in the Everyday Experience of Young American Children.
  23. ↑ Hackman, Daniel (January 8, 2009). "Socioeconomic status and the developing brain". Science Direct. Trends in Cognitive Sciences. Retrieved October 25, 2016.
  24. ↑ Tandon, Pooja S.; Zhou, Chuan; Sallis, James F.; Cain, Kelli L.; Frank, Lawrence D.; Saelens, Brian E. (2012-01-01). "Home environment relationships with children's physical activity, sedentary time, and screen time by socioeconomic status". International Journal of Behavioral Nutrition and Physical Activity. 9: 88. doi:10.1186/1479-5868-9-88. ISSN 1479-5868. PMC 3413573Freely accessible. PMID 22835155.
  25. 1 2 3 Hoff, E.; Laursen, B.; Tardif, T (2002). M. Bornstein, ed. Handbook of parenting: Volume 2, Biology and ecology of parenting. Mahwah, NJ: Lawrence Erlbaum Association. pp. 231–252.
  26. 1 2 3 4 Clark, Eve (2009). First Language Acquisition. New York, NY: Cambridge University Press. pp. 44–46. ISBN 978-0-521-51413-2.
  27. 1 2 Markus, H.; Conner, A (2013). Clash!: 8 cultural conflicts that make us who we are. New York, NY: Hudson Street Press. pp. 89–112. ISBN 1101623608.
  28. 1 2 Kusserow, A (1999). "De-Homogenizing American Individualism: Socializing Hard and Soft Individualism in Manhattan and Queens". Ethos. 27 (2): 210–234. doi:10.1525/eth.1999.27.2.210.
  29. ↑ Hart, Beety (1995). Meaningful Differences in the Everyday Experience of Young American Children.
  30. ↑ Farrant, Brad; Stephen Zubrick (2012). "Early vocabulary development: The importance of joint attention and parent-child book reading". First Language: 343–364.
  31. 1 2 Vasilyeva, Marina; Heidi Waterfall; Janellen Huttenlocher (2008). "Emergence of syntax: Commonalities and differences across children". Developmental Science: 84–97. doi:10.1111/j.1467-7687.2007.00656.x.
  32. ↑ Ravid, Dorit; Rachel Schiff (2012). "Ravid, D., & Schiff, R. (2009). Morphophonological categories of noun plurals in Hebrew: A developmental study". Linguistics: 45–63.
  33. ↑ Schiff, Rachel; Einav Lotem (2012). "Schiff, R., & Lotem, E. (2011). Effects of phonological and morphological awareness on children's word reading development from two socioeconomic backgrounds". First Language: 139–163.
  34. ↑ Noble, Kimberley; Michael Wolmetz; Lisa Ochs; Martha Farah; Bruce McCandliss (2006). "Brain–behavior relationships in reading acquisition are modulated by socioeconomic factors". Developmental Science: 642–654. doi:10.1111/j.1467-7687.2006.00542.x.
  35. ↑ Gardner-Neblett, Nicole; Elisabeth Pungello; Iheoma Iruka (2012). "Oral narrative skills: Implications for the reading development of African American children". Child Development Perspectives: 218–224.
  36. 1 2 Benson, J., Borman, G. (2010). "Family, Neighborhood, and School Settings Across Seasons: When Do Socioeconomic Context and Racial Composition Matter for the Reading Achievement Growth of Young Children?". Teachers College Record. 112 (5): 1338–1390.
  37. 1 2 3 4 5 6 Aikens, N., Barbarin, O. (2010). "Socioeconomic Differences in Reading Trajectories: The Contribution of Family, Neighborhood, and School Contexts". Journal of Educational Psychology. 100 (2): 235–251. doi:10.1037/0022-0663.100.2.235.
  38. ↑ Evans, G. (2004). "The Environment of Childhood Poverty". American Psychologist. 59 (2): 77–92. doi:10.1037/0003-066X.59.2.77. PMID 14992634.
  39. ↑ Santiago, Catherine DeCarlo; Wadsworth, Martha E.; Stump, Jessica (2011-03-01). "Socioeconomic status, neighborhood disadvantage, and poverty-related stress: Prospective effects on psychological syndromes among diverse low-income families". Journal of Economic Psychology. Special Issue on The Psychology and Behavioural Economics of Poverty. 32 (2): 218–230. doi:10.1016/j.joep.2009.10.008.
  40. ↑ Kraus, M.W.; Keltner, D. (2008), "Signs of Socioeconomic Status: A Thin-Slicing Approach", Psychological Science, 20 (1): 99–106, doi:10.1111/j.1467-9280.2008.02251.x, PMID 19076316

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