Reconstruction from the mental image

In three experiments young children were asked to reconstruct an array of objects after they had imagined its appearance following either a rotation of the array or a change in their own position (Huttenlocher & Presson, 1973). In reconstructing arrays, subjects first positioned that object which would be most prominent to an observer following the imagined transformation. Surprisingly, this occurred even when subjects made an egocentric error by reconstructing a copy of the original array. Hence young children, although apparently egocentric, can imagine themselves in a new position with a new perspective. The mental operations which underlie imagined spatial transformations are discussed in light of the results.     

Rhesus monkey (Macaca mulatta) cool sensitivity measured by a signal detection method

Two rhesus monkeys were trained to detect cool stimuli (decrements in skin temperature from the adapted temperature) presented to the palm of the left hand after the skin had been preadapted to a 33°C temperature. The procedure was analogous to the signal detection “yes-no” method used with human observers. Receiver operating characteristic curves were generated by varying the a priori probability of stimulus oecurrence. The proportion of hits and of false alarms increased with increases in the a priori probability of stimulation. The points of isosensitivity of both subjects for cool intensities of 0.3°C, but not at greater intensities, yielded straight lines with slopes of approximately one when plotted on normal-normal coordinates. The values of the d’_s detectability index decreased from 3.52 to 0.75 for one subject and from 2.81 1to 1.28 for the other as the stimulus intensity was decreased from 0.8° to 0.15° cooling from the adapting temperature. Cool thresholds for each subject of 0.19° and 0.12°C were computed from classical psychometric functions when threshold was defined as 50% hits at a 50% probability of stimulus occurrence. These thresholds are comparable to published reports of the cool threshold for the rhesus.     

Operant conditioning of large magnitude, 12-hour duration,heart rate elevations in the baboon

Two baboons were prepared with arterial and venous catheters and their heart rate and blood pressure were monitored continuously thereafter. Following a 2 to 3 week interval during which baseline cardiovascular levels were determined, the animals were exposed to daily 12 hr conditioning sessions (alternating with 12-hr “rest” or “Conditioning Off’ sessions) during which food reward and shockavoidance were programmed as contingent consequences of pre-specified increases in heart rate. Initially, the criterion heart rate was set at 10–15 bpm above the animal’s pre-experimental resting baseline level, with progressive increases programmed to occur at a rate approximating 7 bpm per week over a period of 8–10 weeks. Within this 2–3 month interval, heart rate doubled, reaching levels maintained above 160 bpm for more than 95 per cent of each daily 12-hour “Conditioning On” period. Propranolol selectively eliminated the conditioned heart rate increase but not the blood pressure elevation, indicating the contribution of sympathetic nervous activity to these operantly conditioned cardiovascular changes.     

The fate of old memories

A questionnaire relating to past events, and a well-known faces recognition test, were devised to provide an objective and quantitative assessment of recent and remote memories. Normal subjects aged from 40 to 89 were tested on recall and recognition versions of each test. It was found that performance declined with increasing age for all time periods sampled. No evidence was obtained to support the widely held belief that memory is inversely related to the remoteness of event in older subjects.     

Estimating the Prevalence of Shyness in the “Global Village”: Pluralistic Ignorance or False Consensus?

ABSTRACT Only a minority of those who experience shyness consider themselves to be shy people One explanation for this lies in the possibility that those who so label themselves underestimate the extent to which their feelings are shared by others (i.e, perceive the consensus surrounding their experiences as low [Kelley, 1967]), resulting in an internal rather than external attribution This proposition was tested by asking shy and not-shy followers of two TV soap operas to rate a number of characters from the programs, together with a list of their friends and relatives, for shyness, competitiveness, and optimism Although there were no differences between the groups in their ratings of competitiveness and optimism, the shy subjects reported greater shyness among both the soap-opera characters and their friends and relatives than the not-shy group Whatever the basis for the self-labeling of shyness, therefore, it does not appear to he in the low consensus/pluralistic ignorance notion A number of alternative explanations are discussed, together with the implications of these findings for explanations of the false consensus effect     

Lingual vibrotactile/auditory magnitude estimation and cross-modal matching: comparison of suprathreshold responses in men and women

The purpose of this study was to investigate the response patterns of men and women to suprathreshold lingual-vibrotactile and auditory stimulation. The psychophysical methods of magnitude estimation and cross-modal matching were used on a group of 10 men (M age = 19.6 yr.) and 10 women (M age = 20.2 yr.). Analysis showed that the men and women performed differently on the magnitude-estimation tasks and similarly on the cross-modal matching tasks. These results suggested that sex differences on suprathreshold psychophysical scaling may be related to the way men and women use numbers as opposed to possible differences in the perception of suprathreshold sensory stimuli by men and women.     

Understanding linguistic time sequence and simultaneity: A literature review and some new data

This study investigates the difficulty order in (1) sequence comprehension versus simultaneity comprehension and production, and (2) contribution of semantics, syntax, order of mention, and cognitive (Raven's CPM) and linguistic factors (PPVT) in understanding sequence and simultaneity constructions in Greek, which display similar properties to English sequence and simultaneity constructions. In general, results with kindergartners, first-, second-, and sixth-graders, and graduate school students supported the findings of psycholinguists who claimed that Piaget has specified difficulty order of simultaneity over succession. Performance on simultaneity production tasks was lower then performance on sequence. Performance on simultaneity production tasks was better than performance on simultaneity comprehension and consistently lower than performance on sequence. No consistent order of difficulty between the different construction types of sequence and simultaneity was found. Semantics (arbitrary vs. logical sequences) seems to affect performance, as a few studies have indicated. Unlike most previous findings, an order of mention strategy influences performance when the syntax (transformationally simple vs. complex) and semantics effect is partialed out. Syntax (when not confounded with the two previous variables) does not affect performance. Cognitive (Raven's CPM) and linguistic (PPVT) factors contributed approximately equal amounts of variance to performance on sequence and simultaneity by children in kindergarten and first and second grades.Research and Evaluation Department, Ft. Worth Independent School District.     

Gender and work values: Survey findings from a working-class sample

Traditional propositions concerning gender roles and work values are tested, investigating empirical connections between work values and other variables such as marital status, parenting responsibilities, and age. Both men and women were most likely to select two intrinsic work values—chance to learn new things and chance to use skills and abilities. Women were more likely than men to select a high number of intrinsic values. Male-female differences in work values were found to be situational. The presence of children seemed to heighten sex differences in this working-class sample, particularly in the salience of intrinsic work values for women. Women with children were in the category most likely to select a high number of intrinsic and extrinsic work values.