The interactive effect of introversion-extraversion with caffeine induced arousal on verbal performance

In a test of the arousal hypothesis of introversion-extraversion, subjects were pre- and post-tested on practice Graduate Record Examination verbal performance items while administered caffeine at either 0, 2, or 4 mg/kg of body weight. Introverts increased dramatically in performance between the 0 and 2 mg/kg conditions and then decreased even more dramatically between the 2 and 4 mg/kg conditions. Extraverts showed decrements in performance at the 0 mg/kg level, improved slightly at the 2 mg/kg level, and showed marked improvement at the 4 mg/kg level. Further analyses revealed that introverts increased in both speed and accuracy at low levels of stimulation but then decreased in both at higher levels of stimulation. Extraverts showed continued increases in speed and accuracy across the increasing arousal levels.     

Yes-no answering systems in young children

Across the world's languages two quite different systems are used in answering negative questions such as Aren't you going? In English the speaker answers yes or no depending on the speaker's intention about the matter (e.g., Yes, I am going, if the speaker intends to go). In Japanese, the speaker answers yes or no in agreement or disagreement with the literal statement of the question (e.g., No, I am going, if the speaker is going and thus disagrees with the literal form of the question). One purpose of this study was to see which of these linguistic systems is acquired earlier. The other was to see whether the two systems work independently in bilingual children. The data on positive and negative questions from English and Japanese monolingual children showed that the English system is easier to acquire and the data from Japanese-English bilingual children showed that they used the English system to answer Japanese negative questions. The results suggest that the English system is acquired earlier than the Japanese system and that the two systems interact in bilingual children. These results were discussed in terms of sentence verification models.     

Discrimination and generalization by rats of temporal stimuli lasting for minutes

In three experiments, rats learned to respond differentially to reinforced and nonreinforced trials when the length of the intertrial interval (ITI) predicted the trial outcome (reinforcement or nonreinforcement). Rats in control groups, for whom the length of the ITI did not predict the outcome, did not show differential performance on nonreinforced and reinforced trials. Generalization gradients obtained following discrimination training were comparable to those obtained following discrimination training with other types of discriminative stimuli. That is, groups which had shown differential performance in discrimination training yielded generalization gradients with fastest speeds at the previously reinforced ITIs, slowest speeds at the previously nonreinforced ITIs, and intermediate speeds at ITIs of intermediate length. Control groups yielded flat gradients across all ITIs tested. These effects were shown for relative time discrimination (short time = reinforcement, long time = nonreinforcement, or the reverse) and also for an absolute time discrimination (long and short time = reinforcement, middle time = nonreinforcement or the reverse). This method was effective for time duration measured in minutes rather than seconds, as is more commonly the case.     

Effect of positive,negative, and mixed occupational information on cognitive and affective complexity

A series of concentrated research studies over the past 8 years has significantly demonstrated that cognitive complexity in the vocational realm is positively related to congruence or appropriateness of vocational choice. Moreover, research has shown that introducing occupational information significantly reduces, rather than increases, cognitive complexity. The results of the study reported here relate to changes in cognitive complexity as a function of the type of occupational information introduced, namely, information with respect to the advantages of occupations; the disadvantages of occupations, or a combination of positive and negative features of occupations. Our results clearly demonstrated that while positive occupational information alone leads to greater simplicity, negative or mixed information significantly retards the trend toward greater simplicity. Results are discussed from both theoretical and practical perspectives, especially with reference to the typical occupational information provided in routine vocational counseling.     

Self-consciousness,evaluation of physical characteristics,and physical attractiveness

Results from an investigation of the relationship between habitual awareness of oneself as a social object (Public self-consciousness) and speed of processing information about the overt self are reported. Since high public self-consciousness subjects report themselves to be concerned about their physical appearance, they were expected to have more readily retrievable evaluative judgments concerning their physical characteristics. Consistent with this prediction, high compared to low public consciousness subjects required significantly less time to report their evaluations of eleven of their physical features. In a second study, high public self-consciousness was shown to be positively related to judged physical attractiveness in two geographically diverse samples. The quicker evaluations of the high public self-consciousness group were discussed in terms of information processing model recently described by Markus (1977).     

Defendant characteristics and juridic decisions

Research has demonstrated that attractive defendants receive more preferential treatment than do less attractive defendants. The present study examined two explanations for this finding (liking-leniency and causal inference models). It varied both the attractiveness of the defendant's traits and their relevance to the likelihood of committing a traffic felony. Results indicated that the attractive defendant was found less guilty than the unattractive defendant only when the traits were associated with the likelihood of acting criminally. This suggests that a causal inference model was appropriate when subjects decided guilt. However, a liking-leniency model was supported for decisions on severity of punishment as the attractive defendant was treated more leniently than the unattractive defendant, regardless of the relevancy of the traits to the crime.     

Patterning,partial reinforcement,and N-length effects at spaced trials as a function of reinstatement of retrieval cues

Four experiments are reported which demonstrate the importance of the reinstatement of retrieval cues in partial-reinforcement experiments using spaced trials. Reinstatement occurs when the goalbox and startbox are of the same brightness (gray). Nonreinstatement occurs when the goalbox and startbox are of different brightnesses (black-and-white striped vs gray). Under reinstatement conditions, both a partial-reinforcement effect (PRE) and N-length effects were observed whether small reward or large reward was used. Under nonreinstatement conditions, a PRE was observed when large reward was used but not when small reward was used; N-length effects were not observed either with large or small reward. Finally, using a 24-hr intertrial interval, single alternation patterning was found only with a group receiving large reward, a long nonreward confinement duration, and reinstatement. These results are not consistent with the notion that massed and spaced trials are governed by separate mechanisms, and support an explanation of both massed and spaced trials based on E. J. Capaldi's sequential theory.     

Cognitive differentiation in women and pioneer-traditional vocational choices

In order to test the hypothesis that women who went into male dominated fields (pioneers) were more cognitively complex in social relationships than women who went into female dominated fields (traditionals), 83 college seniors were classified and tested using a grid for cognitive complexity in their roles. As predicted, the pioneers were more differentiated (p < .05) in their perception of various social roles and supported the research in cognitive complexity in vocational behavior.     

The effects of review on young children's memory for prose

The present study investigated the effects of review on young children's memory for prose. Prose passages were parsed into three levels of thematic importance. Five groups (128-year-old children each) participated in three experimental sessions, with each session separated by 1 week. During the first session all subjects listened to two passages. One week later, subjects in four of the groups received differing review experiences. During the third session, delayed retention was assessed. The data are interpreted to indicate that the repetition of the original learning experience was the most effective review; however, immediate reproduction following initial exposure also significantly attenuated forgetting. All groups favored the central passage ideas in their delayed recalls, regardless of their review treatment. The potential benefits of an immediate test as a review exercise was suggested.     

The prediction of political evaluation and voting preference: A multidimensional analysis

Two separate studies, using college students in a political behavior class, tested the relationship between evaluation and voting preferences on the one hand and the dimensions emerging from a multidimensional scaling of similarity judgments for a set of nationally known political figures. Both studies found that political evaluation and voting preferences were highly predictable from three major dimensions underlying political perception. In Study I (n = 64), the subjects' self-ratings of liberal-conservatism yielded individual differences in the predictability of activity and potency from the political dimensions as well as differences in the relationships among evaluation, activity, and potency. In Study II (n = 51), the subjects' own authoritarianism indicated differences in the manner in which political figures were perceived in the multidimensional space.     

Generality of persistence: The role of stimulus and response factors in persistence to punishment

Previous research has shown that intermittent punishment of a response increases its persistence to continuous punishment and that intermittent punishment training in one situation produces persistence to continuous punishment in other situations. Experiment 1 showed that as long as the instrumental response and punishing stimulus were held constant from intermittent to continuous punishment marked differences between these situations had no decremental effect on persistence. Experiment 2 showed that intermittent punishment training of one response resulted in substantial persistence to continuous punishment of a different and apparently incompatible response and that such response change had no more than a marginal effect on persistence. The results were seen as requiring some revision to the traditional conditioning-model interpretation of persistence to punishment.     

The smoked plastic screen: An alternative to the one-way mirror

A double thickness, smoked plastic screen is presented as an alternative to the one-way mirror. Relative to the glass mirror, the use of the plastic screen provides a safe, nondistracting, durable, light weight, and inexpensive method for unobserved viewing without an appreciable loss in light transmission.     

Individualized learning environments: Intra- and interpersonal consequences

This study examines the effects of individual goal structures on the intra- and interpersonal behavior of 120 fourth-grade children. Each group of four children was introduced to one of two individualized learning programs: (a) workbook materials color-coded according to level of difficulty (allowing implicit comparisons among children as to progress), and (b) materials not coded according to difficulty (discouraging comparisons). In both learning programs, children worked individually (at story writing) and were rewarded for the work. Results indicate that boys, but not girls, who were rewarded equally for doing good work in an individualized setting but who start and end at a lower step than other more frequently took away a toy from those peers with whom they compared themselves than did boys who were rewarded equally for good work and where there were no comparisons. Boys as a group, regardles of condition, gave more prize tickets to themselves than to others and gave more prize tickets to themselves than girls gave either to themselves or others. Both boys and girls appear to adopt the evaluations of their work given by the experimenter and appear to be influenced thereby in later prized-giving to themselves and to others.     

Congruency,consistency, and differentiation of vocational interests as predictors of vocational satisfaction and preference stability

The Ramak interest inventory (Meir, E. I. Manual for the Ramak and Courses interest inventories, 1975; Barak, A. & Meir, E. I. Journal of Vocational Behavior, 1974, 4, 377–387), together with an occupational choice satisfaction (OCS) inventory, was administered to 158 males and 202 females who had responded to the Ramak 7 years before. The results of the study show: (a) congruence (Holland, J. L. Making vocational choices, 1973) correlated positively with males' and females' OCS (p < .01), while consistency and differentiation correlated with males' OCS when vocational interests were congruent with occupational field; (b) congruency, consistency, and differentiation all had a positive effect on OCS of males (p < .05); (c) when there was incongruency, no negative correlations between consistency and differentiation on the one hand and OCS on the other were found; (d) for males and females, positive correlations (p < .05) were found between congruency, consistency, differentiation, and stability of occupational interests; and (e) differentiation measured in percentages was found valid twice. Theoretical and practical implications of the findings are discussed.     

Cognitive differentiation as a function of information type and its relation to career choice

Although providing occupational information is a common vocational counseling practice, recent research has raised questions about the utility of such information. Cognitive differentiation (the ability to differentiate among job titles on 12 constructs) has been shown to be positively related to an “appropriate” career choice. Differentiation, however, appears to decrease as a function of traditional types of occupational information (e.g., Occupational Outlook Handbook, U.S. Department of Labor, Washington, D.C., 1980). The present study investigated the hypothesis that information related to Holland personality characteristics of persons in various occupations would increase subjects' ability to differentiate among those job titles. One hundred fifty undeclared-major freshman undergraduate students were randomly assigned to one of three condition groups: objective information, personality information, no information. All subjects were administered the Career Decision Scale and Cognitive Differentiation Grid. Results indicated that subjects receiving personality information exhibited a significantly greater degree of differentiation among careers than subjects receiving objective information. These results confirm the major hypothesis of the study and suggest that the provision of personality information may be more useful in promoting career choice than the types of information traditionally provided.     

Classification and perceptual development: Exploring issues about integrality and differential sensitivity

Pre- and elementary-school children, 4 and 11 years of age, were given a classification task similar to those given in research testing an account that posits a developmental shift from integral to separable perception. The development of perceptual sensitivity and its role in determining similarity and dimensional classifications was assessed with the variables of predisposed and distinctiveness-based salience. The results indicated that the level of perceptual sensitivity to the dimensions in the task determined the frequency of types of classifications. Children in both age groups made both kinds of critical classifications as a function of predisposed and distinctiveness-based salience.