Verbal communication, nonverbal communication, and private speech in lower and middle socioeconomic status preschool children.

Three types of communication--verbal, nonverbal, and private speech--were investigated in 4- and 5-year-old children. Multiple analyses of variance (MANOVAs) without IQ controlled and multiple analyses of covariance (MANCOVAs) with IQ as a covariate were computed and followed by ANOVAs and ANCOVAs to determine the effects of sex, age, and socioeconomic status (SES) on each of these types of communication. The ANOVAs and the ANCOVAs yielded the same conclusions. Results indicated that age and SES, but not sex, influence the use of the three communication types. From age 4 to age 5, private speech decreased for middle SES children and remained the same for lower SES children. Although lower SES children had more nonverbal communication at both age levels than middle SES children, nonverbal communication decreased for middle SES children and increased for lower SES children between the ages of 4 and 5 years. Both lower and middle SES groups increased in verbal communication between the two ages. The middle SES 4-year-olds used more verbal communication than their lower SES counterparts, and the difference was maintained at age 5. Although IQ is related to verbal communication, statistically controlling for the effects of IQ did not change the conclusions.

Attention to stimuli, verbal labeling, and question asking in referential communication.

This study evaluated the effects of age, the dyad's attention to and verbal labeling of target and nontarget stimuli, and listener instructions to ask questions on referential communication in 48 five-year-old and 48 eight-year-old dyads. A MANOVA for dyad activities indicated both age and dyad-activities differences. The dyads that located and verbally labeled the critical attributes were superior to the dyads that simply located the critical attributes and to control dyads on speaker performance. A MANOVA for listener instructions to ask questions yielded no age differences on the number of questions asked and no interaction between age and instructions to ask questions. It indicated that listeners instructed to ask questions and control listeners differed on the number of questions asked but not on communication accuracy.

Communication Accuracy in Lower- and middle-SES children as a function of task abstraction.

The Communication encoding performance of lower-SES black, lower-SES white, and middle-SES white children was evaluated when the same familiar stimuli for eliciting communication were presented at three different levels of abstraction. No differences were found between social-class groups. Performance did not differ as a function of level of abstraction. The social group X level of abstraction interaction was not significant. Thus the level of abstraction of the stimuli does not impede the communication encoding performance of lower-SES children. Previous findings of social-class differences in communication accuracy may be an artifact of stimuli that are not equally familiar to all groups.

Visual and auditory selective attention and reflection-impulsivity in normal and learning-disabled boys at two age levels.

Selective attention to visual and auditory stimuli and reflection-impulsivity were studied in normal and learning-disabled 8- and 12-year-old boys. Multivariate analyses, followed by univariate and paired-comparison tests, indicated that the normal children increased in selective attention efficiency with age to both visual and auditory stimuli. Learning-disabled children increased in selective attention efficiency with age to auditory, but not to visual, stimuli. Both groups increased with age in reflection as measured by Kagan's Matching Familiar Figures Test (MFF). The 8-year-old learning-disabled children were more impulsive than the 8-year-old normals on MFF error scores, but not on MFF latency scores. No difference occurred between the 12-year-old learning-disabled and normal children on either MFF error or MFF latency scores. Correlations between the selective attention scores and MFF error and latency scores were not significant.

Reflection-impulsivity in normal and behavior-disordered children.

The primary index of reflection-impulsivity is Kagan's Matching Familiar Figures Test (MFF), which yields both a latency and an error score. To evaluate further the construct validity of these measures, both the latency and error scores of 9- and 15-year-old normal and "acting-out" behavior-disordered children were compared. Young behavior-disordered children were found to be more impulsive than the other groups on the MFF error measure. No differences occurred on the MFF latency measure. This result is consistent with previous findings with normal children in supporting the construct validity of the MFF error score and raising questions about the construct validity of the MFF latency score. Findings were inconsistent with Kagan's assertion that normal children become more reflective with age. The older behavior-disordered children were more reflective on the error measure than the younger behavior-disordered children and had equivalent error scores to both age groups of normals. This finding suggested a lag in the development of reflection in behavior-disordered children.