Recognition and recall as measures of long-term retention

Acquisition and retention of a list of paired associates were measured either by cued recall or by multiple-choice recognition. The method of testing used during original learning was combined factorially with the type of test administered after a 1-week interval. Speed of learning to criterion under the two procedures was comparable. Long-term recognition was substantially higher than recall. This difference did not interact significantly with the method of learning. Recall benefited substantially from a prior test of recognition, but there was little effect when the order of tests was reversed. It is concluded that (a) both occurrence and retrieval information were stored under each condition of learning, and (b) occurrence information is less subject to forgetting than retrieval information.     

Peripheral and central components in variants of the Mueller-Lyer illusion

Illusion decrement with prolonged inspection was used as a technique to assess the relative amount of central component in seven variants of the Mueller-Lyer illusion. Results indicate that all of the variant forms share a common, central component, while the peripheral components, such as lateral inhibition, vary as a function of the presence of converging lines in the illusion configurations.     

Delay of gratification in children: The effects of training under fixed,decreasing and increasing delay of reward

The effect of fixed, gradually decreasing, or increasing delay of reward in discimination learning on later delay of gratification was investigated. In discrimination training, employing a correction procedure, a candy reward was delivered either after 0, 10, 20, 40 or 60 sec fixed delay; or after 60 sec in the first block of trials and decreased in successive block; or reward was immediate in the first block of trials and delay was gradually increased to 60 sec. In the delay of gratification tests, subjects could press a button immediately to receive a small reward (one candy or a cheap toy) or delay pressing and receive an increasingly larger reward (more candy or a better toy).Learning was not significantly affected by either fixed or decreasing delays. Increasing delays resulted in faster learning than decreasing delays. The increasing delay group demonstrated superior delay of gratification on both tests. Fixed delay groups did not differ significantly among themselves, nor from the decreasing delay group. The effectiveness of exposure to increasing delays in facilitating delay of gratification was interpreted as due to either the acquisition of coping responses or the extinction of frustration.     

An empirical taxonomy of visual illusions

A classification system for visual-geometric illusions, based upon the interrelationships between behavioral responses to various distortions was created. Forty-five illusion configurations were presented to 221 observers. Factor analysis revealed that there are five classes of illusions. A secondorder analysis revealed that visual distortions are ultimately reducible to two global types of distortions: illlusions of extent and illusions of shape or direction.     

Prism adaptation with simultaneous receipt of normal input

A 20-diopter vertically-displacing prism was worn on one eye in conjunction with plane glass on the other. Five groups ofSs differed in the density of a neutral filter worn over one eye. No aftereffect could be measured in either eye in any condition where the luminance of the “normal” field was equal to or greater than that of the prism field. As the luminance of the “normal” field is decreased below that of the prism field, the magnitude of aftereffect increases and is measurable in each eye.     

Should assessment center dimension ratings be mechanically-derived?

This study examined the relationship between consensusderived and mechanically-derived assessment center ratings using a sample of 110 police candidates. It was determined that the two sets of dimension ratings were highly correlated (medianr=.83). Further, the mechanically-derived and the consensus-derived assessment ratings both correlated with the overall assessment ratings (OAR) at .71. It was estimated that the organization in this study could save $6137.92 a year, and $36.89 per assessee by eliminating the team meeting (consensus decision-making).     

Braille learning: Relative importance of seven variables

A number of experiments have demonstrated that the learning of braille is affected by a variety of factors. The present experiment was carried out to determine the relative importance of these variables for braille learning. The variables were stimulus set discriminability (high, low), study modality (visual, haptic), test modality (visual, haptic), study size (large vs standard braille cell), test size (large vs standard braille cell), study rate (5 or 10 seconds per item), and test rate (5 or 10 seconds per item). The results showed that study modality, stimulus set discriminability, and test modality were the variables mainly responsible for differences in performance during acquisition. Some practical and theoretical implications of these results are considered.     

Acute neuropsychological consequences of coronary artery bypass surgery

This study examines a series of coronary artery bypass patients (CABS) for neuropsychological and regional cerebral blood flow (RCBF) changes at 8 days and 8 weeks post surgery. Seventy-three percent were found to have moderate or severe neuropsychological deficits at 8 days post operation and 37% at 8 weeks post surgery. A comparison group of major vascular and thoracic surgery patients was also found to have a significant proportion of neuropsychological deficit following surgery. The RCBF assessments indicated a significant drop in mean RCBF at 8 days post surgery in the coronary artery bypass group which did not persist to 8 weeks. The comparison group showed no changes in RCBF following surgery. The findings suggest different patterns of recovery and origins of the neuropsychological deficit in the two groups and emphasize the need for appropriate control groups in studies examining the cortical effects of extracorporeal circulation. In addition, the project received generous support from the special trustees of the Middlesex Hospital.     

The Importance of Contraceptive Attributes Among College Students

This study assessed how ratings of the importance of contraceptive attributes varied with gender, age, relationship status, and contraceptive method usually used. In a classroom setting, 210 male and 217 female university students completed the 55-item Contraceptive Attribute Questionnaire (CAQ). Significant differences on importance ratings were found between women and men, age groups, women using barrier methods and women using the pill, and by relationship status. The underlying dimensions of the CAQ were investigated through factor analysis, and somewhat different factors emerged for men and women. Implications for the provision of family planning services to college students are discussed.