Case-mixing effects on children's word recognition: Lexical feedback and development

Presenting words in MiXeD cAsE has previously been shown to disrupt naming performance of adult readers. This effect is greater on nonwords than it is on real words. There have been two main accounts of this interaction. First, case mixing may disrupt naming via non-lexical spellingto-sound correspondences to a greater extent than it disrupts lexical naming. Alternatively, stored lexical knowledge of words may feed back to a visual analysis level during processing of a visually presented word, helping known words to overcome the visual disruption caused by case mixing. In the present study, when young children (aged 6 and 8 years) were tested, case mixing did not disrupt nonword naming more than word naming. However, slightly older children (aged 9 years) demonstrated the same pattern of performance as adults. These results support the view that topdown lexical information can aid overcoming visual disruption to words, and that beginning readers have not developed the stored word knowledge necessary to allow this. In addition, a greater case-mixing effect on high-frequency words for the youngest age group (6-year-olds) suggests that their word recognition may be based more on wholistic visual features than is that of older children.     

Playing with fire: effects of negative mood induction and working memory on vocabulary acquisition

We investigated the impact of emotions on learning vocabulary in an unfamiliar language to better understand affective influences in foreign language acquisition. Seventy native English speakers learned new vocabulary in either a negative or a neutral emotional state. Participants also completed two sets of working memory tasks to examine the potential mediating role of working memory. Results revealed that participants exposed to negative stimuli exhibited difficulty in retrieving and correctly pairing English words with Indonesian words, as reflected in a lower performance on the prompted recall tests and the free recall measure. Emotional induction did not change working memory scores from pre to post manipulation. This suggests working memory could not explain the reduced vocabulary learning in the negative group. We argue that negative mood can adversely affect language learning by suppressing aspects of native-language processing and impeding form-meaning mapping with second language words.     

Predictors of preschool language environments and their relations to children's vocabulary

Despite support for the importance of early language environments, little is known about the naturally occurring experiences children have in preschool settings. The current study sample included 91 children (M_age = 4.72 years; 56% male; 67% White) from 23 preschool classrooms and nearly 1500 h of language environment data from three waves throughout the preschool year. Of the sociodemographic characteristics, family income is most closely related to children's preschool language environments. A standard deviation increase in family income was related to children hearing approximately one million more adult words in their preschool classroom. However, conversational turns were the more robust predictor of vocabulary skills with effect sizes around 0.20, depending on model specification. Theoretical and policy implications of these findings are discussed.     

Parents as moderators of psychological and physiological correlates of inner-city children's exposure to violence

This paper discusses the psychological and physiological correlates of inner-city violence on children, and the potential mediating and moderating roles of parents. Data are based on interviews regarding exposure to community violence (ECV), parenting practices, child distress, posttraumatic symptomology, and competence. Cardiovascular activation was also measured. Community violence exposure related to distress, posttraumatic symptomology, and incompetence. Harsh parenting related to aggression, distress, incompetence, and higher heart rates. Parenting moderated but did not mediate the effects of violence on measures of competence. High violence plus harsh parenting predicted lower levels of systolic (SBP) and diastolic blood pressure (DBP). Results are discussed within an ecological framework of parent–child relations and as they relate to the conclusion that children undergoing dual levels of stress may experience a dissociative response.     

Traditionality of children's interests as related to their parents' gender stereotypes and traditionality of occupations

This study tested the common hypothesis that parents' gender stereotypes, maternal employment status, and the traditionality of parents' occupations, are associated with the traditionality of children's vocational interests. The traditionality of preschool children's (n=113) interests was examined by an instrument developed for the current study. Parents were administered the Attitudes toward Women Scale, and traditionality of their occupations was assessed. Only the traditionality of the mothers' occupations significantly correlated with the traditionality of the interests of both boys and girls. Other variables tested, as well as their interactions, were not found to show such relationships. The results were discussed in terms of the function of the role model in gender identity development and vocational schema modification.We thank Rachel Karniol for her helpful comments on an earlier draft of this article.     

Mental verb input for promoting children's theory of mind: A training study

An experimental study investigated the effect of the type of mental verb input (i.e., input with think, know, and remember) on preschoolers’ theory of mind development. Preschoolers (n = 72) heard 128 mental verb utterances presented in video format across four sessions over two weeks. The training conditions differed only in the way the mental verbs were presented: the form (statement or question), the referent (first person or other person), and the interaction style (overheard or interactive). Children who overheard the characters discussing the mental states of someone else, either in statement or question form, significantly improved in their false belief understanding. These experimental findings demonstrate mental verb utterances about other people, even when not directed to the child, scaffold children's attention to differing perspectives, thus more efficiently promoting some aspects of their ToM development.     

Teachers' knowledge of children's exposure to family risk factors: accuracy and usefulness

Teachers' knowledge of children's exposure to family risk factors was examined using the Family Risk Factor Checklist-Teacher. Data collected for 756 children indicated that teachers had accurate knowledge of children's exposure to factors such as adverse life events and family socioeconomic status, which predicted children's mental health problems at 1 year follow-up. For children at high teacher-rated risk, odds ratios ranged from 3.04 to 7.46, after adjusting for prior mental health problems. Teachers had poor knowledge of internal family functioning, such as conflict, parenting practices, or parental drug abuse. The findings suggest that asking teachers to report children's exposure to particular family risk factors is a feasible method for identifying children for selective interventions, but improved family-school communication may further enhance this process.     

Diversity not quantity in caregiver speech: Using computational modeling to isolate the effects of the quantity and the diversity of the input on vocabulary growth

Children who hear large amounts of diverse speech learn language more quickly than children who do not. However, high correlations between the amount and the diversity of the input in speech samples makes it difficult to isolate the influence of each. We overcame this problem by controlling the input to a computational model so that amount of exposure to linguistic input (quantity) and the quality of that input (lexical diversity) were independently manipulated. Sublexical, lexical, and multi-word knowledge were charted across development (Study 1), showing that while input quantity may be important early in learning, lexical diversity is ultimately more crucial, a prediction confirmed against children’s data (Study 2). The model trained on a lexically diverse input also performed better on nonword repetition and sentence recall tests (Study 3) and was quicker to learn new words over time (Study 4). A language input that is rich in lexical diversity outperforms equivalent richness in quantity for learned sublexical and lexical knowledge, for well-established language tests, and for acquiring words that have never been encountered before.     

Adults' representations of the Earth: Implications for children's acquisition of scientific concepts

When children are asked to draw the Earth they often produce intriguing pictures in which, for example, people seem to be standing on a flat disc or inside a hollow sphere. These drawings, and children's answers to questions, have been interpreted as indicating that children construct naïve, theory‐like mental models of the Earth (e.g. Vosniadou & Brewer, 1992 ). However, recent studies using different methods have found little or no evidence of these mental models, and report that many young children have some scientific knowledge of the Earth. To examine the reasons for these contrasting findings, adults (N = 350) were given the drawing task previously given to 5‐year‐old children. Fewer than half of the adults' pictures were scientific, and 15% were identical to children's ‘naïve’ drawings. Up to half of the answers to questions (e.g. ‘Where do people live?’) were non‐scientific. Open‐ended questions and follow‐up interviews revealed that non‐scientific responses were given because adults found the apparently simple task confusing and challenging. Since children very probably find it even more difficult, these findings indicate that children's non‐scientific responses, like adults', often result from methodological problems with the task. These results therefore explain the discrepant findings of previous research, and support the studies which indicate that children do not have naïve mental models of the Earth.     

Reading for meaning: The effects of concurrent articulation

Six experiments are reported which examine the assertion that phonological recoding for the purpose of lexical access in visual word recognition is prevented or impaired by concurrent articulation (“articulatory suppression”). The first section of this paper selectively reviews the literature, and reports two experiments which fail to replicate previous work.

The third experiment contrasts performance with visually presented words and with non-words. Latency measures show an effect of suppression that is specific to words, whilst error rates show an effect common to both words and non-words. The fourth experiment shows that if the task is changed from a judgement of rhyme (BLAME-FLAME) to one of homophony (AIL-ALE), the suppression effect seen in the latency data is eliminated, whilst error effects remain. It is suggested that, in addition to producing error effects that are not easily interpretable, suppression prevents or impairs a phonological segmentation process operating subsequent to the retrieval of whole word phonology (a process that is needed for rhyme judgement but not for one of homophony).

Experiment V shows that while suppression has no effect on the time taken to decide if printed non-words sound like real words (e.g. PALLIS), error rates increase. Experiment VI shows that suppression has no effect on either RT or errors in the same task if subjects suppress at a slower rate than in Experiment V.

It is suggested that there are at least two different phonological codes. Buffer storage and/or maintenance of phonologically coded information derived from print is affected by suppression; phonological recoding from print for the purpose of lexical access can be carried out without any interference from suppression.     

Spanish-English bilingual toddlers’ vocabulary skills: The role of caregiver language input and warmth

There is a well-documented link between bilingual language development and the relative amounts of exposure to each language. Less is known about the role of quality indicators of caregiver-child interactions in bilingual homes, including caregiver input diversity, warmth and sensitivity. This longitudinal study examines the relation between caregiver input (lexical diversity, amount), warmth and sensitivity and bilingual toddlers’ subsequent vocabulary outcomes. We video-recorded caregiver-child interactions in Spanish-English Latino homes when toddlers (n = 47) were 18 months of age (M = 18.32 months; SD = 1.02 months). At the 24-month follow-up, we measured children's vocabulary as total vocabulary (English, Spanish combined) as well as within language (Spanish, English). Results revealed that Spanish lexical diversity exposure at 18 months from caregivers was positively associated with children's Spanish and total vocabulary scores at 24 months, while English lexical diversity was positively associated with children's English scores; lexical diversity and amount were highly correlated. Additionally, caregivers’ warmth was positively associated with children's Spanish, English and total vocabulary scores. Together, these factors accounted for substantial variance (30–40%) in vocabulary outcomes. Notably, caregiver input accounted for more variance in single language outcomes than did caregiver warmth, whereas caregiver warmth uniquely accounted for more variance in total vocabulary scores. Our findings extend prior research findings by suggesting that children's dual language development may depend on their exposure to a diverse set of words, not only amount of language exposure, as well as warm interactions with caregivers. A video abstract of this article can be viewed at https://youtu.be/q1V_7fz5wog

Highlights

• Video-recorded observations of caregiver-child interactions revealed warmth and high sensitivity from Latino caregivers.
• Linguistically-detailed analyses of caregiver input revealed wide variation in the diversity of Spanish and English directed at 18-month-old bilingual toddlers.
• Bilingual toddlers’ vocabulary (single language, total) was positively associated with caregivers’ diverse input and warmth, thus extending prior findings on bilinguals’ amount of language exposure.
• Findings suggest that caregivers’ lexical diversity explains more variance in bilingual toddlers’ single language outcomes, whereas warmth explains more variance in total vocabulary scores.

     

Receiving support as a mixed blessing: evidence for dual effects of support on psychological outcomes

Although social support is thought to boost feelings of closeness in dyadic relationships, recent findings have suggested that support receipt can increase distress in recipients. The authors investigated these apparently contrary findings in a large daily diary study of couples over 31 days leading up to a major stressor. Results confirm that daily support receipt was associated with greater feelings of closeness and greater negative mood. These average effects, however, masked substantial heterogeneity. In particular, those recipients showing greater benefits on closeness tended to show lesser cost on negative mood, and vice versa. Self-esteem was examined as a possible moderator of support effects, but its role was evident in only a subset of recipients. These results imply that models of dyadic support processes must accord a central role to between-individual heterogeneity.     

The functions of phonology in the acquisition of reading: Lexical and sentence processing

It has been claimed (V. Coltheart, Laxon, Rickard, & Elton, 1988) that learners as well as skilled readers use phonology for multiple functions in reading-for-meaning tasks. This claim was examined using lexical decision and sentence evaluation tasks. It was found in the first experiment that the type of instruction learners had received determined whether there was prelexical use of phonology in responding to items out of sentence context. Type of instruction had no effect when the items were in context. In the second experiment, performances on a homophone sentence evaluation task and a homophone semantic decision task, which excluded sentence processing, were examined. The results suggest that phonology served the function of access to lexical meanings in addition to any function in postlexical sentence processing. The obtained relationships between relative frequencies of the presented and unpresented homophone mates and item accuracy on these tasks were inconsistent with exclusive use of “direct access” but consistent with access of lexical meanings via phonology and application of a “spelling-check” procedure when multiple homophonic meanings are activated.     

Availability of family support as a moderator of exposure to community violence.

Examined the role of availability of family support in moderating the negative effects of exposure to community violence on internalizing symptoms. Participants were 75 low-income African American children between the ages of 10 and 15. Two measures of availability of family support (mother's presence in the home and family size) were evaluated as moderators of the relations between exposure to community violence and depression and posttraumatic stress disorder (PTSD) symptoms. After controlling for age, sex, and concurrent life stress, mother's presence in the home moderated the relation between exposure to community violence and depressive symptoms but not the relation between exposure to community violence and PTSD symptoms. Children living in mother-absent families were at increased risk of depressive symptoms as exposure to community violence increased. In addition, family size approached significance as a moderator of depressive symptoms but not PTSD symptoms, revealing a trend toward children from smaller families being at increased risk of depressive symptoms as exposure to community violence increased. These findings suggest that although availability of family support is an important moderator for depressive symptoms, this is not the case for PTSD symptoms.     

Stress and support as related to postpartum paternal mental health and perceptions of the infant

This study examined the relationship of stress and social support to psychological adjustment, attitudes towards the parental role, and perceptions of infant behavior in two groups of fathers: an index group of 50 men whose wives had a diagnosed postpartum depression, and a control group of 50 men whose wives had no such disorder. Fathers with more stress and less support had higher levels of psychological symptomatology. Index fathers reported more stress, particularly from work and economic pressures. Index fathers were also less likely than controls to report support from in-laws, other relatives, and friends. Stress, but not support, was associated with more negative perceptions of the marriage, the parental role, and infant behavior. Work-related stress was most likely to have an impact on paternal attitudes. These findings suggest the need to adopt a family focus when studying postpartum depression. © 1997 Michigan Association for Infant Mental Healt