Timing the Selection of Information During Rhythmic Catching

Catching a ball requires that information be available close to the catch but early enough for prospective or corrective control. In the present experiment, 6 participants were asked to throw and catch a ball continuously for 1 min while wearing liquid-crystal goggles that restricted viewing to specific amounts of time at specific intervals. Participants were free to select the information by varying the frequency and phasing of throwing relative to the goggles. Video analysis revealed that they elected a frequency of throwing that matched the goggle frequency and chose to view the ball at or around its zenith. Earlier portions of the ball's trajectory were viewed as the goggle frequency increased. Despite variations in the viewing location, participants elected to view the ball on average 365 ms before the catch. Analysis of the hand's trajectory further revealed that the time interval (M = 82 ms) between the ball's zenith and the initiation of the final motion of the hand toward the catch did not vary as a function of the frequency of throwing. The authors conclude that the timing constraints imposed by the hand's movement are the basis for the selection of information for catching.     

Observations on the adaptation of induced motion

Induced motion (IM) was measured before and after a 10-min adaptation period during which subjects viewed the IM display without judging IM magnitude. The inducing stimulus was a rectangle, which contains both horizontal and vertical reference detail. The magnitude of IM was significantly lower following the adaptation period. This result is inconsistent with the hypothesis that adaptation of IM represents an instance of perceptual learning wherein the contribution of relative motion to motion perception is reduced. In a separate study, similar results were obtained when the inducing stimulus was a single vertical bar presented either to the left or to the right of the fixation stimulus. In addition, adaptation was obtained when the location of the inducing bar was changed during test measures, demonstrating that this effect is not specific to the retinal locus of the adaptation stimulus.     

The behavioural treatment of sexual inadequacy: A comparative study

Thirty-six couples complaining of sexual difficulties were treated with one of three methods: (1) systematic desensitisation plus counselling. (2) directed practice—based on that of Masters and Johnson—plus counselling. (3) directed practice with minimal contact. Both members of each couple were seen together, but half in each treatment group were treated by a single therapist and half by a therapist pair. Differences in outcome among the groups were not highly significant, but consistent trends were found which suggested that the combination of directed practice and counselling was associated with most change, particularly when two therapists were involved.     

Cognitions related to anxiety: a pilot study of treatment

In general, where anxiety appears to have a specific external focus, such as the situations which are avoided by phobic patients, treatment involving systematic exposure to those situations seems to be effective. This is less appropriate, or even impossible, where anxiety is not dependent on any external circumstance, but is described by the patient as occurring at any time or place, either chronically over long periods, or acutely in the form of ‘panic attacks’. These patients with ‘generalised’ anxiety often describe internal cues for anxiety either in the form of thoughts (e.g. worry over a current problem) or somatic (e.g. chest sensations interpreted as possible heart disease). Beck et al. (1974) has suggested that on interview, all patients diagnosed as suffering from diffuse or generalised anxiety can report specific ideas or other cognitive cues which are associated with anxiety. These usually concern possible traumatic events, such as illness and death, or social rejection. Clearly Beck has in mind the possibility that these cognitions have the effect of inducing anxiety, although even if the validity of the subjective reports were to be accepted, the problem remains of whether the relationship between mood state and cognitions is causal and if so, in which direction it operates. Obviously a causal relationship may also operate in both directions simultaneously, to form a ‘vicious circle’ in which each exacerbates the other. To establish whether there is a sense in which particular cognitions contribute causally to anxious mood, it would be necessary to find a method of manipulating the type or frequency of cognitions thought to be operating in this way.

One obvious possibility is that of ‘thought-stopping’: that is, patients could be taught to identify thoughts which are associated with anxiety and stop them in the usual way (Wolpe, 1973, p. 211) e.g. by' shouting stop, and substituting an alternative thought. The present study was planned as a pilot experiment to determine (i) if appropriate anxiety related cognitions could be elicited from a series of patients with generalised anxiety, (ii) if the reported frequency of such thoughts could be modified by a thought-stopping technique, and (iii) if any changes in thought frequency were associated with improvements in mood.

Clearly there are many ‘non-specific’ features involved in thought-stopping which could also have therapeutic effects on mood. For this reason it was necessary to include an alternative procedure, not directed at reducing thought frequency, but having the same degree of plausibility to patients, and preferably to therapists. The control procedure chosen for this purpose was modelled on desensitisation, in which patients were encouraged to allow the supposedly anxiety-provoking thoughts into their mind and tolerate them, rather than attempt to stop them. In summary, the study employed a relaxation training phase as a base-line, followed by a cross-over design in which the two treatment phases of thought-stopping and ‘cognitive desensitisation’ were given to each patient, in balanced order.     

An ethical perspective on caregiving in the family

The emphasis on intra-family caregiving that prevailed from ancient until relatively recent times, in both philosophy and practice, was substantially displaced under the influence of the Eighteenth Century Enlightenment by an emphasis on individual independence. The ethics of familial relationships ceased to be at the center of philosophical interest. A consequence was growing inattention to the social conditions and practical arrangements needed to support family efforts to take care of the very young, the very old, the physically or mentally ill or disabled, and others in need of care. The myth of the self-sufficient family must be exploded to permit the development of a public policy that will make such support possible.     

Infant temperament and performance on the Bayley Scales of Infant Development at 4, 8, and 12 months of age

Infants were assessed with the Rothbart Infant Behavior Questionnaire (an objective measure of infant temperament based on maternal reports) and the complete Bayley Scales of Infant Development (BSID) at 4, 8, and 12 months of age. Activity level was related to BSID performance at each age with babies who obtained higher scores rated as more active. Activity level was also related to the infants' behavior during the test administration at 8 and 12 months. A negative relation was found between smiling and laughter and the mental development index at 8 and 12 months. These data suggest that aspects of infant temperament as assessed by maternal report share a small amount of variance with BSID performance and the amount of shared variance increases with age.     

MMPI predictors of mania among psychiatric inpatients

MMPI data from 64 patients with a diagnosis of manic-depressive illness, manic type, were compared with MMPI data from patients in two comparison groups--64 patients with a psychotic diagnosis other than manic-depressive illness, and 64 patients with a variety of psychiatric diagnoses. Manic patients had higher Ma scale scores for MMPI scales that assess personal distress and interpersonal difficulties (e.g., D and Si). Discriminant analysis, with the Ma, D, and Si scales as predictors, correctly classified as manic or not manic 82.5% of the patients in the derivation sample and 74.2% of the patients in the cross-validation sample. Two high-point pairs, Sc-Ma/Ma-Sc and Pa-Ma/Ma-Pa, occurred in the MMPI profiles of almost half of the manic patients but were rarely found among the profiles of other patients. The results of this study support the use of the MMPI in identifying manic patients, particularly when discriminating between mania and other types of psychosis.     

Differential predictability of females and males

This study examined the existence of sex differences in validity coefficients from a variety of different types of tests. It was found that female validities significantly exceeded male validities by .04 correlational units. When the validities were broken down by predictor categories, no significant differences were observed between males and females on either personality or high school background measures; and female validities exceeded male validities on tests of abstract reasoning, clerical abilities, information, mathematical abilities, verbal abilities, and composite scores from multiple tests. Implications of these findings are discussed.Use of the Michigan State University computing facilities was made possible through support, in part, from the National Science Foundation.     

Evaluation of male and female applicants for sex-congruent and sex-incongruent jobs

The present study was designed to assess whether applicants for a sex-incongruent position would be evaluated less favorably by personnel administrators than applicants for a sex-congruent position. It was predicted that negative evaluations of sex-incongruent applicants would increase as a function of participants' reliance on sex-role stereotypes. Forty-four personnel administrators were asked to review the qualifications and evaluate one of four job applicants. Sex of the applicant and sex-orientation of the position were systematically varied. Participants were presented with credentials of a male or female applicant for a traditionally male- or female-oriented position. While results did not support Cohen and Bunker's contention that sex-incongruent job applicants would be viewed less favorably, the data did suggest that evaluations of the sex-incongruent applicants (especially the female applicant) varied as a function of sex-role stereotyping.The authors wish to gratefully acknowledge the assistance provided by Thom Hurlburt, Joan Van Tassel, and Amy Post.