Tower of Hanoi performance of retarded young adults and nonretarded children as a function of solution length and goal state

Three experiments were conducted with the Tower of Hanoi task to assess problem solving ability in 6-, 7-, 8-, and 10-year-old nonretarded children and mentally retarded young adults of varying maturational ages. In Experiment 1 we gradually reduced the number of moves required for solution until subjects could solve the 3-disk tower-ending problem. Although all groups experienced difficulty with the standard 7-move problem, all but the trainable retarded group readily solved the 6-move problem. The trainable group did not reach a comparable level of success until the 4-move problem. On the 7-move problem the retarded groups performed at the level of nonretarded groups that were maturationally $\text{1}\text{1}\text{2}$ to 3 years younger. An analysis of first moves indicated that subject groups differed in the strategies they used to solve the problems. In Experiment 2, practice effects were ruled out as a source of the superior performance on the 6- than on the 7-move problem. In Experiment 3, 7- and 10-year-old nonretarded children and mentally retarded young adults did not differ on 5-move problems in which configuration of the goal states was varied. A comparison of all 5-move problems judged to have the same depth of search requirements indicated that the tower-ending problems were significantly easier to solve than the partial-tower-ending problems, which in turn were easier than the flat-ending problems. A limited depth of search capacity sets boundaries on the use of sophisticated strategies and, to a large extent, accounts for the retarded groups' maturational lag.     

Cognitive styles in the development of medical careers

Recent research has shown that academic choice and achievement may be partly a function of the student's standing on the field-dependence-independence cognitive-style dimension. The results of two longitudinal studies suggest that information about field dependence-independence may be of value for student guidance in the medical setting. The first, a study of college undergraduates who early expressed an interest in medicine, showed that these cognitive styles play a discernible role in determining who will eventually enter medical school. The second, a study of medical students, showed that field-dependent and field-independent students subsequently tend to choose different medical specialties. These results are consistent with cognitive-style theory, which proposes that field-independent people will choose vocations that require cognitive restructuring skills, whereas field-dependent people will choose vocations that require greater social-interpersonal involvement.     

Does awareness of speech as a sequence of phones arise spontaneously?

It was found that illiterate adults could neither delete nor add a phone at the beginning of a non-word; but these tasks were rather easily performed by people with similar environment and childhood experiences, who learned to read rudimentarily as adults. Awareness of speech as a sequence of phones is thus not attained spontaneously in the course of general cognitive growth, but demands some specific training, which, for most persons, is probably provided by learning to read in the alphabetic system.     

Factors in the Use of Oral Contraceptives by Young Women

This study examined the use of oral contraceptives in a sample of sexually active college women. The analytic approach employed was based on Fishbein's model for the prediction of behavior, which emphasizes perceived consequences and normative influences. It was found that each of these factors was significantly related to use of oral contraception, and that a stronger relationship was obtained when both components were combined. Results suggested that nonusers are more Likely to associate oral contraception with unhealthful consequences than are users, and that users believe employment of this method enhances their sexual satisfaction. It was also suggested that the opinions of these young women's partners and close friends, but not of their parents, are reflected in respondents' use of the pill. These results were compared with earlier findings on the correlates of intentions to use oral contraceptives, and applied implications were discussed.     

WITHDRAWAL OF CHRONIC CHLORPROMAZINE MEDICATION: AN EXPERIMENTAL ANALYSIS

Approximately 50% of all institutionalized, mentally retarded adults receive psychotropic medication to control inappropriate behavior. In this study, behaviors exhibited by five retarded adults were formally observed while they were on and off medication. Each subject had been receiving chlorpromazine for six or more years prior to the start of the study. The drug was withdrawn and readministered using a double-blind B-A-B (drug-placebo-drug) design. Effects were highly individualized. Some desirable behavior emerged when chlorpromazine was discontinued.     

Effects of an observer on eating behavior: the induction of "sensible" eating.

An experiment was conducted to investigate the extent of caloric compensation to differential preloading among normally restrained and unrestrained female subjects. Subjects' eating was either explicitly observed or unobserved by the experimenter. Unrestrained eaters compensated appropriately for the preload, whether or not they were observed. Restrained eaters failed to compensate when unobserved , but compensated strongly when observed. A subsequent unobserved eating task revealed that restrained eaters failed to compensate for prior consumption when the observer was withdrawn. Implications for research and therapy are discussed.     

Pathological left-handedness: Evaluation of a model

This study investigated the relationship between manifest handedness and the localization of EEG abnormalities in a large group of mentally retarded persons. Persons who had abnormal EEG recordings, regardless of whether the dysfunction was bilateral or asymmetric, exhibited approximately twice the incidence of left-handedness than persons who had normal EEG's. Data for persons having asymmetric damage support a model of pathological left-handedness, with left-handers showing a substantially higher probability of having left brain dysfunction than right-handers.     

Differences in human ability to judge veracity from the audio medium

The few past studies in this topic area have consistently found that human subjects, as a group, are able to judge veracity better than chance; but no findings have been published relating individual differences to judgmental accuracy. Thus the present study was designed as a first step in filling this knowledge gap. To create a stimulus set of lies and truths, which listeners would later judge for veracity, a method was employed that generated 10 audio-tape recorded lies and 10 audio-tape recorded truths. Each of 100 subject-listeners judged each audio-tape for veracity, and also provided information on a set of personological variables. Listener, as a group, were significantly better than chance in accurately judging veracity (p < .001). In addition, a set of personological variables (social intelligence, field dependence/independence, number of siblings, TV viewing habits, and confidence in judgments) was identified that accounted for 22% of the variance in accuracy (p < .0002). It is acknowledged that these findings are tentative and will require replication before they can be regarded as reliable or valid.     

The Mexican American in Higher Education: Implications for Educators

From a review of literature and an examination of data from the Counseling Services at the University of Texas - El Paso, the authors conclude that Mexican-American students place more emphasis on cooperation and group achievement than on individual achievement, and that the education of Mexican Americans may be enhanced when teachers properly reinforce “successful behavior.” In addition, it seems that problems may arise in using U.S.-based theories of “democratic” leadership styles because the Mexican-American culture places more emphasis on traditional leadership roles.