Recovery from occipital stroke: a self-report and an inquiry into visual processes

This report summarizes the behavioural effects of a right occipital stroke in the author. An upper left quandrantanopia resolved over the first 50 poststroke days to leave a scotoma that included the left upper quadrant of the fovea and extended upwards about 6 degrees and lateral about 15 degrees. There was no further reduction in size over the next 4 years. In the early stages of recovery there was an inability to detect consciously either the presence of objects or their motion, except upon reflection once an object entered the intact visual field. This has been referred to previously as blindsight. On about the fourth day poststroke, part of the scotoma became visually active, producing a scintillating aura, which remains. Shortly thereafter colour perception returned in the scotoma, as did motion detection. Although there was little additional change in the field defect after 2 months, the author's visual abilities have continued to improve, in large part because of a shift in fixation such that information at the centre of the visual field now falls about 1.5 degrees into the lower right portion of the fovea. The implications of the visual and behavioural changes are discussed in the context of multiple visual systems and with respect to recovery of function.     

Open-field behavior in domestic chicks tested individually or in pairs: Differential effects of painted lines delineating subdivisions of the floor

The open field is a common test of fear, but the apparatus varies widely. Lines painted on the floor facilitate measurement of locomotion (areas entered), but, though some animals balk at lines, this variable has received little attention. In Experiment 1, 10-day-old female chicks were tested individually in an open field with an unmarked floor or one delineated into areas by 1- or 3-mm-wide black lines. In Experiment 2, chicks were tested in pairs in the presence or absence of 3-mm-wide lines. Strong intraindividual correlations demonstrated that both paces and areas entered are effective measures of locomotion. Chicks tested individually were unaffected by the presence or width of lines. Conversely, pair-tested chicks paced and pecked more when the floor was delineated. Given the latter findings, some standardization is recommended.     

Polygraph Testimony and Juror Judgments: A Comparison of the Guilty Knowledge Test and the Control Question Test1

The present experiment investigated the impact of the Control Question Test (CQT) and the Guilty Knowledge Test (GKT) on the verdicts of mock jurors. Although studies have indicated that polygraph evidence has little influence on jurors' verdicts (Cavoukian & Heselgrave, 1980; Spanos, Myers, Dubreuil, & Pawlak, 1992–1993), no research has previously distinguished between the different types of polygraph tests and their impact on juror verdicts. In the present study, jurors were shown a videotape of a simulated rape-murder trial that contained either CQT polygraph evidence, GKT polygraph evidence, or no polygraph evidence. No differences were found among the 3 conditions for either jury verdicts or individual juror verdicts, and jurors tended to rate both forms of polygraph testimony below other forms of equally suspect evidence, such as eyewitness testimony, in its influence on their decision-making process.     

Behavior of the rat after removal of the neocortex and hippocampal formation

After surgical removal of the neocortex and hippocampal formation, rats retained most of the movement patterns of locomotion, climbing, grooming, feeding, and fighting. However, forepaw immobility during swimming was abolished. Feeding behavior was suppressed temporarily but recovered partially. The distinctive postures of sleep and walking and a circadian rhythm of motor activity were retained. However, behaviors were often not performed at the appropriate time and place. The normal sequence of grooming behavior was disrupted; food hoarding and social behavior were essentially abolished. Removal of the neocortex alone had much the same effect as removal of neocortex and hippocampus together. Removal of hippocampus alone produced only a mild disruption of behavior. It is suggested that ascending nonspecific projections to the cerebral cortex play an important role in the moment-to-moment control of behavior but are not essential for the sleep-waking cycle.     

Sex-role behaviors and personality traits of male day care teachers

It was hypothesized that male day care teachers who had adopted the feminine role of caregiver would score feminine in their personality traits and would reinforce children for feminine behaviors and punish them for masculine behaviors. A random sample of 20 male caregivers was contrasted to 20 male engineers on personality traits as assessed by The Adjective Checklist (ACL). Twenty female caregivers were also contrasted to the personality traits and the sex-typed contingency behaviors of the male caregivers. Feminine traits were defined by raw scores on the Abasement, Nurturance, Affiliation, Succorance, and Deference scales of the ACL. Masculine traits were represented by raw scores on the Achievement, Dominance, Endurance, and Autonomy scales. The Fagot-Patterson Checklist was employed to determine sex-typed contingency behaviors. Both male and female caregivers reinforced children significantly more for feminine behaviors than masculine behaviors (as defined by The Fagot-Patterson Checklist) and punished masculine behaviors more than feminine behaviors. The personalities of the male caregivers corresponded to the feminine direction of their female counterparts, but they were not significantly more feminine than the male engineers. The female caregivers, however, scored significantly more feminine in personality than the male engineers.This study is based on a dissertation submitted by Bryan E. Robinson to the Department of Child Development — Family Relations, University of North Carolina at Greensboro, in partial fulfillment of the requirements for the Ph.D.     

Sex and cultural differences in the factorial structure of the self-directed search

Holland's Self-Directed Search was administered to 247 male and 252 female high school students, aged 16 to 18 years, attending state schools in New Zealand. Principal factor analysis was used in an attempt to identify six orthogonal factors analogous to Holland's six personality types. The Social and Enterprising scales could not be split into two factors in either sample, and the Investigative and Realistic scales defined a single factor for the female students. Computed distances between pairs of the six personality types in five dimensional factorial space were compared with the relative ordering of the distances expected from Holland's hexagonal model. The positions of the types in space corresponded more closely with the model for the males than they did for the females. The results, in conjunction with those of similar studies in Israel and the United States, imply that the correspondence between some summary codes on the SDS and existing occupational classifications based on Holland's types may be less than perfect, particularly for females. Also, care should be taken when using codes on the SDS to calculate Holland's indices of “consistency,” especially for females.     

Group therapy in an outpatient setting with borderline and narcissistic delinquents on probation

DSM-III criteria are used to describe the pathological manifestations of narcissistic and borderline disorders. The former gives rise to the Grandiose Self and the need to control the world. The delinquent act is an attempt to gain such control. The latter demonstrates ego splitting, primitive terror and rage stemming from the failure of the primary maternal introject. The attempt to compensate for inner turmoil and lack of object relatedness leads to delinquent acts. Citing three probationers referred by the court for group therapy, benefits and obstacles encountered in the use of outpatient group therapy are discussed as an approach to solving the unique problems presented by these delinquents.     

The sources of developmental differences in children's incidental processing during discrimination trials

Crane and Ross reported that second graders learned more than sixth graders about attributes made relevant after solution of a discrimination task. Here two experiments are reported that enlighten the sources of this developmental difference. Both make use of an experimental technique whereby children verbalize their hypotheses during solution of a discrimination problem. The results indicate that ten-year-olds do not learn about incidental attributes that they tested while irrelevant in the pre-solution period, but that five-year-olds and seven-year-olds do. Children of all three ages process incidental information about attributes that they did not sample pre-solution. With some qualification, the incidentally processed information is retained throughout a five-minute delay interval. The results bear on developmental trends in the distribution of attention and on theoretical accounts of incidental learning in discrimination tasks.