The effects of a discriminative cue and an incompatible activity on generalized imitation

Four noncompliant retardates were observed in a generalized imitation study. Two variables were studied: provision of a competing reinforced activity, and use of a cue to aid discrimination between reinforced and nonreinforced imitations. Both variables were found to increase the rate of discrimination between the two sets of stimuli. Greatest discrimination occurred when both cue and alternative task were present. Discrimination decreased when the variables were removed. Results are interpreted as implying that imitation of nonreinforced cues in generalized imitation procedures varies with the degree to which reinforcement is available for other activity, as well as with the complexity of the discrimination problem. These results help indicate conditions under which the generalized imitation effect may be observed in more naturalistic settings.     

No impairment in sign language after right-hemisphere stroke

A 52-year-old right-handed woman who became deaf before the development of speech, suffered an occlusion of the right middle cerebral and a marked stenosis of the right anterior cerebral arteries. She showed no disturbance in the manual sign language or in finger-spelling, in contrast to previous reports of cases with left-sided damage.     

Establishing discriminative stimulus control within generalized oddity performance,without reinforcement

In two oddity learning studies with children, subjects were reinforced for oddity (or nonoddity) responding on line-tilt or dot numerosity problems. Interposed form and color problems were not reinforced. No instructions to make oddity choices were given. In Experiment I it was found that reinforcement for oddity or nonoddity responding on tilt and numerosity problems produced the corresponding tendency toward oddity or nonoddity performance on these problems and also on the nonreinforced form and color problems. These results show a generalized oddity phenomenon similar to generalized imitation. In Experiment II a third type of nonreinforced problem was presented in this same format: compound stimuli permitting either a color or a form solution. It was found that immediate prior training with nonreinforced form problems, interpolated among the reinforced tilt and numerosity problems, led to form-oddity choices in the compound problems. Similarily, color pretraining produced color-oddity choices. These results show that selective discriminative stimulus control can be obtained in oddity learning, without reinforcement for choices on either of the two dimensions involved.     

Short-term memory in the pigeon with presentation time precisely controlled

Delayed matching-to-sample was studied in the pigeon using a procedure which precisely controlled the presentation time of the sample stimulus. Experiments 1 and 2 revealed that (a) accuracy of matching increased as a negatively accelerated function of presentation time, (b) accuracy declined when an interstimulus interval was introduced between successive presentations of the sample stimulus, and (c) the rate at which accurate matching was restored after an interstimulus interval was greatest when the initial presentation of the sample was short and the interval was long. It was concluded that a theory of STM based on the growth and decay of trace strength could account adequately for all of these findings. Experiment 3 studied trace interaction by presenting two sample stimuli first in succession and then simultaneously for choice. Predictions from trace competition theory about the specific lengths of presentation of these stimuli at which choice of the second stimulus should be 50% or deviate systematically below 50% were not supported. It appears that a recency mechanism in addition to competition is necessary to explain trace interaction effects.     

The validity of formal and informal personality assessments

Two recent articles by M. Burisch (1984, American Psychologist, 37, 214–227; 1984, Journal of Research in Personality, 18, 81–98) have presented data bearing on the traditional methods by which personality is assessed. Based on a review of selected empirical studies and analyses of new data, Burisch has concluded that (a) single-item global self-ratings generally yield greater coefficients of criterion validity than questionnaire measures of the same traits, and (b) most existing personality questionnaires can be shortened considerably without any consequent loss in validity. These conclusions stand in direct contrast to previous appeals by Epstein and others for the use of extensive aggregate measures of personality derived according to the axioms of psychometric theory. In response to Burisch, we describe measurement artifacts and strategies of test item selection that account for some of his conclusions and we reiterate the need for the application of conventional construct-based questionnaires in the assessment of personality.     

Stages-of-learning analysis of developmental interactions in memory,with illustrations from developmental interactions in picture-word effects

Although Age × Treatment interactions have been widely viewed as key results in theories of memory development, most examples of such results (e.g., Age × Treatment interactions in the effects of item concreteness, item elaboration, and organizational context) have been identified in list-learning experiments where children of different ages receive a small, fixed number of study-test cycles on the target list. A stages-of-learning analysis reveals that such designs confound a treatment's potential interactions with age and its potential interactions with stage of learning. The analysis also reveals specific situations in which such designs will produce converging, diverging, and crossover Age × Treatment interactions even though the treatment does not interact with age in any way. A series of experiments is reported in which a mathematical model that incorporates stages-of-learning distinctions is applied to the well-known interaction between age and item concreteness (pictures versus words) in cued recall. Although a diverging Age × Treatment interaction has been observed in previous research, it was found that there are at least four different interactions between the picture-word manipulation and age; (a) a diverging interaction at storage that operates throughout elementary school; (b) a diverging interaction localized within retrieval learning and operating during the first half of the elementary school; (c) a converging interaction localized within retrieval learning and operating during the second half of elementary school; and (d) a diverging interaction localized within retrieval performance and operating throughout elementary school.     

Effects of fear of success on women's performance at masculine versus feminine tasks

The present study was designed to test hypotheses derived from Horner's theory concerning the effect of the sex-role orientation of the performance situation on the arousal of the motive to avoid success in women. The study compared the performance of women high and low in the motive to avoid success in a male-oriented and a female-oriented situation. It was found that women performed significantly better (p < .01) in the male-oriented than in the female-oriented situation, with this difference between conditions being greater for those women scoring high rather than low in the motive to avoid success (p < .05). These results are inconsistent with an inhibitory anxiety explanation of motive to avoid success. The possibility that the measure of this motive may in part be a measure of ability is discussed.     

Developmental change in early representational intelligence: Evidence from spatial classification strategies and related verbal expressions

The procedures 1- to 3-year-old children use to group simple sets of objects are analyzed in an investigation of cognitive change in early representational intelligence. Forty children spontaneously manipulated two-class arrays and participated in two experimental probes of object grouping. Children 1 to 2 years of age group classes by looking for one kind of thing at a time. Consistent with this, they verbally mark single classes. Children from $\text{2}\text{1}\text{2}$ to 3 years old employ spatial grouping procedures that require simultaneous consideration of two classes, and they refer to relations between classes. Advances made during the second year are consistent with other initial signs of representational-symbolic intelligence. The advances in the third year are unaccounted for by traditional cognitive-developmental theories, but they are congruent with late-emerging patterns in natural representational systems such as language, suggesting the presence of broad changes in mental organization shortly after the onset of representational intelligence.     

When what is said is important: A comparison of expert and attractive sources

Ninety-eight female subjects were presented with a statement made by an attractive or an expert source suggesting that people should sleep less than the usual eight hours. For approximately half of the subjects the source gave a simple statement of opinion, for the other half six separate supporting arguments were also presented. As predicted the manipulation of number of arguments provided had more influence on the effectiveness of the expert than the attractive source. Results were interpreted as supporting the hypothesis that quite different dynamics underly the persuasive power of attractive and expert individuals.     

Developmental considerations in the study of childhood depression

Although a great deal of research has been conducted examining biological and psychological factors related to adult depression, relatively little attention has been given to the study of depression in children. The purpose of the present article is to illustrate the importance of considering normal developmental processes in the study of childhood depression. Epidemiological data, diagnostic issues, and methods of assessment in childhood depression are discussed from a developmental perspective, and the role of developmental issues in both the manifestation of depression and its assessment is outlined. Four major theories of depression—biological, psychoanalytic, behavioral, and cognitive—are presented, and developmental issues are discussed in relation to each theory's formulation of the etiology, maintenance, and treatment of depression. Finally, alternative methodologies for the study of childhood depression are considered, and directions for future research, particularly for investigations examining the relationship between childhood and adult depression, are advanced.     

The effects of expected future interaction and prior group support on the conformity process

Previous results indicate that people conform more to group judgments when they have received unanimous group support for their opinions than when they have received no support. The present study tested the hypothesis that these differences would be attenuated when future interaction with the group members was anticipated. The 70 male subjects were tested in a Crutchfield-type conformity situation, where prior group support (100 vs 0%) and anticipation of future interaction (alone vs group) were manipulated. Predictions were based on an examination of conformity incentives that considered normative and informational sources of social influence, as well as Hollander's model of idiosyncracy credit. Consistent with predictions, conformity in the 0% prior support condition was greater when subjects anticipated future group interaction than when they did not, whereas the reverse was true in the 100% prior support condition. In addition, conformity was correlated negatively with both confidence in task ability and feelings of group acceptance when future interaction with the group was anticipated. These data suggest that when future group activity is expected, the tendency to reciprocate past treatment from the group is reduced.     

Reaction times and speed-of-processing: Their relationship to timed and untimed measures of intelligence

Eighty-one university students were given a battery of reaction time tests, measuring the speed with which they performed various elementary cognitive processes, and a group test of intelligence which yielded timed and untimed scores. Multiple regression analyses indicated that speed of information-processing was an equally good predictor of timed and untimed intelligence test performance, and that various combinations of speed-of-processing variables accounted for as much as 48% of the variance in intelligence test scores. Different speed-of-processing variables varied relatively systematically in the extent to which they correlated with the individual subtests and scales of the intelligence test.     

Extraversion,neuroticism, psychoticism and self-reported delinquency: Evidence from eight separate samples

Eight separate samples of high school and university students (Total N = 410) in Britain and Canada were used to test predictions from Eysenck's theory that delinquents should be high scorers on scales of extraversion, neuroticism, and psychoticism. Self-report paper- and pencil-questionnaire measures of both personality and delinquency were administered under conditions that ensured anonymity. The evidence showed clear support for a relationship between high delinquency scores and high scores on both extraversion and psychoticism. These relationships held up across diverse samples and different ways of analyzing the data. No support was found for a relationship between delinquency scores and the dimension of neuroticism.     

Stimulus configuration and valence-enhanced pecking by neonatal chicks

Valence-enhanced pecking occurs when hatchling chicks preferentially peck at releasing stimuli that have been assigned increased releasing power or valence. Enhanced valence is assigned by another releasing stimulus—here a “pecking” arrow. Pecking movements by the arrow have two separate effects: the stimulation or release of pecking by chicks and releasing valence enhancement, that is, pecking directed to particular stimuli. Exposure of chicks to the moving arrow yields pecking significantly increased over that accruing to a stationary arrow. A distinctive stimulus placed on the floor at the tip of the arrow, or, most effective, attached to the tip of the moving arrow, produces enhanced valence: pecking by observing chicks that is selectively increased to matching stimuli.     

Some effects of lick-contingent delays on the development of schedule-induced polydipsia

Experiments 1 and 2 examined the effects of various durations of lickcontingent delays of reinforcement on the development of schedule-induced polydipsia. Food was provided every 1 min in the absence of licking. Delays of 1 min or more effectively disrupted the development of the licking behavior. In Experiments 3 and 4 a lick-contingent stimulus was provided in addition to the delay of food delivery. A light, which was turned on by a lick and turned off by food, greatly enhanced the development of polydipsia under delays that had previously prevented such development. A tone proved less effective than the light in promoting the development of polydipsia. Adventitious reinforcement and conditioned punishment explanations of these results were considered. A distinction was drawn between the mechanism responsible for the development of schedule-induced behavior and that responsible for its maintenance.     

Perceived qualifications,resource abundance,and resentment about deprivation

Two experiments tested the hypothesis that perceptions of being well qualified for a desired object will decrease individuals' resentment about deprivation when opportunities for obtaining the object are good (i.e., when the resource is abundant), but increase resentment when the resource is scarce. In the first experiment, unemployed nurses participated in a survey of the job situation for nurses. The initial questions in the survey were designed to manipulate respondents' perceptions of (a) their qualifications for employment, by affecting their perceived similarity to employed nurses (similar vs different), and (b) the job potential for unemployed nurses (improve vs worsen). In the second experiment, subjects competed over a number of trials with other participants for money that they had previously been promised. Some of the subjects had practiced the task ahead of time (qualified subjects), whereas others had not (unqualified subjects). In addition, the number of payments that were allegedly available was varied (many vs few). In both experiments, the manipulation of good qualifications reduced resentment when the resource was abundant, but did not significantly affect resentment when the resource was scarce. The implications of these results for understanding the determinants of resentment about deprivation are discussed.