Sex-typed motor behaviors of “feminine” boys,conventionally masculine boys,and conventionally feminine girls

The purpose of this study was to determine whether, in four commonly observed childhood behaviors, the gross impression conveyed by “feminine” boys is distinctive from that of conventional boys, and in the direction of conventional girls. Three samples of children age 4–10 years were included in the study: boys with atypical sexual identity (N=12); age-matched conventionally sex-typed boys (N=8); and age-matched girls (N=7). The children were identically costumed to conceal gender and were videotaped while throwing a ball, walking, running, and telling a story. Videotaped segments of behaviors were randomly presented to four raters who judged the sex of the child on a five point scale which ranged from very likely male to very likely female. The analyses indicate that the sample to which the child belonged was the most important factor in explaining the rating the child received. The “feminine” boys occupied an intermediate position, one that was neither distinctly “feminine” nor distinctly “masculine.”     

CROSS-AGE TUTORING: FIFTH GRADERS AS ARITHMETIC TUTORS FOR KINDERGARTEN CHILDREN1

Five fifth-grade students tutored five kindergarten children in basic arithmetic skills for 7.5 weeks. A control group consisted of five kindergarten children who received no tutoring and were matched with the experimental group in arithmetic ability. Pre-, mid-, and posttesting was done using a skills-based arithmetic test. Results showed that the experimental group made far greater gains than the control group on a post-test comparison (matched pairs signed ranks test p = 0.062). In addition, a subanalysis of specific arithmetic skills showed they were improved only when tutoring for that skill was carried out. Systematic observations made of the tutor-student interactions indicated wide tutor-to-tutor variability in the percentage of student responses praised, and very little use of negative, disapproving statements. It was concluded that trained fifth-grade students can effectively teach basic arithmetic skills to kindergarteners.     

On the investigation of local identifiability: A counterexample

An assertion that the parameters of a covariance structure are locally identified at a certain point only if the rank of the Jacobian matrix at that point equals the number of parameters, is shown to be false by means of a counterexample.     

INCREASING SPELLING ACHIEVEMENT: AN ANALYSIS OF TREATMENT PROCEDURES UTILIZING AN ALTERNATING TREATMENTS DESIGN

Two studies which examine the effectiveness of spelling remediation procedures are reported. In both studies, an alternating treatment design was employed. In the first study, positive practice overcorrection plus positive reinforcement was compared to positive practice alone and a no-remediation control condition. In the second study, positive practice plus positive reinforcement was compared to a traditional corrective procedure plus positive reinforcement and a traditional procedure when used alone. Results of both studies indicated that the combined positive practice plus positive reinforcement procedure was more efficient and that it was preferred by the children. Following brief training under this combined procedure, all children demonstrated 100% spelling accuracy.     

Repeating the target neither speeds nor slows its detection: Evidence for independent channels in letter processing

A target letter at a predesignated location typically is identified less readily when extraneous letters are added to the display. This disruption has been attributed to lateral interference via interactive or inhibitory channels or to attempts to encode the string as a unit. In the present study, subjects saw a single letter (e.g., B), a repeated-letter string (e.g., BBBB), or an extraneous-letters string (e.g., BCLD) and had to decide whether the leftmost letter in the string matched a target letter. Since trials were blocked by string type, letter position did not have to be discriminated on repeated-letter trials, nor was response competition present on those trials. With normal letter spacing, RT was virtually the same on repeated-letter trials as on single-letter trials. (Increasing the letter spacing in Experiment 3 did produce a slight, but nonsignificant, 22-msec increment on the repeated-letter trials.) The results indicate that individual letters are perceived as such just as well when presented in a group as when presented individually and thus provide support for the parallel, independent-channels model.     

Speech prosody in Broca's aphasia

Because speech prosody is thought to be impaired in Broca's aphasia, we conducted three experiments using Broca's aphasics and nonneurological control subjects in order to determine to what extent this statement is accurate. Using three acoustic measures of speech prosody—sentence-final fundamental frequency (F₀) fall, F₀ declination, and sentence-final lengthening—we found that some aspects of prosody were spared while others were abnormal. All Broca's aphasics, regardless of degree of impairment, exhibited sentence-final F₀ fall. F₀ declination was present in simple sentences but was absent over longer domains; moreover, the amount of declination was correlated with the degree of linguistic impairment. Sentence-final lengthening was clearly absent in Broca's aphasia; in fact, sentence-terminal words were actually shorter than their sentence-initial and medial counterparts.