Perfect visual short-term memory for periodic patterns

Abstract

The short-term memory for spatial frequency information was assessed by measuring the spatial frequency discrimination thresholds for briefly flashed luminance gratings as a function of the time interval between the test and reference gratings, using a computer-controlled two-interval forced-choice procedure. Discrimination thresholds were stable for interstimulus intervals in the range 1–30 sec under all conditions tested. At low contrasts, short exposure times and low spatial frequencies discrimination thresholds increased, but no interactions between stimulus parameters affecting thresholds and interstimulus interval were observed. It is concluded that factors limiting spatial discrimination are associated with the sensory coding stage. Spatial discrimination and visual memory may be based on a common representation, which is perfectly retained in short-term memory. Visual half-field tests revealed no hemispheric differences in the processing and retention of spatial frequency information.     

Impacts of Home-Based Telework on Quality of Life for Employees and Their Partners. Quantitative and Qualitative Results From a European Survey

The study investigates the effects of home-based telework on quality of life (QoL). Four dimensions of QoL were analysed; overall satisfaction with life, sense of belonging, sense of becoming and sense of being. Through cross-national survey data (from 217 job holders and 112 partners) and by means of structural equation modeling, a positive association was found between home-based telework to a worker's sense of belonging (beta = 0.30, p < 0.001). On the other hand, a negative path was detected from the job holder's home-based telework to his or her partner's overall satisfaction with life (beta = –0.27, p < 0.05). After controlling for subdimensions of life quality, home-based work did not affect the job holder's overall life satisfaction. Moreover, the more concentration the job holder reported, the lower the sense of belonging was reported by his or her partner (beta = –0.28, p < 0.05). No simple explanation for the negative effects were found, but our interviews with the group of workers and their families leave us the impression that the problem of overworking and withdrawal was most relevant to the cases, in combination with negative spill-over effects and unclear boundary settings in the home.     

Forensic interviews with preschool children: An analysis of extended interviews in Norway (2015–2017)

This study examined the quality of forensic interviews conducted by specially trained police officers in the Norwegian Barnahus between 2015 and 2017, using the sequential interview (SI) model, a Norwegian version of the extended interview model that has not previously been studied. Two hundred and seven interviews of alleged abused preschool children (3–7 years old) were selected from around the country. Developmental trends in interview dynamics and the pattern of disclosure were analyzed. Analyses showed that the interviews were long but involved few open-ended and many suggestive questions, especially in interviews with the youngest children who did not disclose. Because similar findings were obtained in previous studies of Norwegian interviews not using this model, the findings suggest that the SI interview model does little to improve the formal quality of forensic interviews with very young children, and show the need to develop new forms of interviewer training which are more intensive than those currently employed.     

Spatial-frequency discrimination, brain lateralisation, and acute intake of alcohol

The effect of alcohol (breath-alcohol level of 0.1%) on perceptual discrimination of low (1.5 cycles deg-1) and high (8 cycles deg-1) spatial frequencies in the left and right visual field was measured in eighteen right-handed males, in a double-blind, balanced placebo design. Discrimination thresholds for briefly (180 ms) presented sinusoidal gratings were determined by two-alternative forced-choice judgments with four interleaving psychophysical staircases providing random trial-to-trial variation of reference spatial frequency and visual field, in addition to a random (+/- 10%) jitter of reference spatial frequency. Alcohol produced overall higher discrimination thresholds but did not alter the visual-field balance: no main effect of visual field was observed, but in both placebo and alcohol conditions spatial frequency interacted with visual field in the direction predicted by the spatial-frequency hypothesis of hemispheric asymmetry in visual-information processing, with left-visual-field/right-hemisphere superiority in discrimination of low spatial frequencies and right-visual-field/left-hemisphere superiority in discrimination of high spatial frequencies.     

Verbs and Verb Phrases as Instructional Stimuli in the Control of Stimulus-Equivalence Effects

The Psychological Record - This research examined in 26 undergraduate students a form of instructional control of certain emergent relations definitional of the stimulus-equivalence relationship....     

A Validation Study of the Resilience Scale for Adolescents (READ)

In this study, the validity of the recently developed 28-item Resilience Scale for Adolescents (READ) was examined. Survey data from a representative sample of 6,723 Norwegian senior high school students between 18 and 20 years of age were used for this purpose. Validity and reliability were investigated by means of exploratory and confirmatory factor analysis, correlations with other relevant variables, and internal consistency measures. The results supported the construct and convergent validity of the five factors of a modified 23-item version of the scale, which also yielded acceptable psychometric properties. The paper concludes that the modified READ is a valid measure assessing relevant resilience factors with relatively few items, thereby serving as a valuable tool in resilience and risk-factor research.     

Expertise in pictorial perception: eye-movement patterns and visual memory in artists and laymen

In two sessions with free scanning and memory instructions, eye-movement patterns from nine artists were compared with those of nine artistically untrained participants viewing 16 pictures representing a selection of categories from ordinary scenes to abstraction: 12 pictures were made to accommodate an object-oriented viewing mode (selection of recognisable objects), and a pictorial viewing mode (selection of more structural features), and 4 were abstract. The artistically untrained participants showed preference for viewing human features and objects, while the artists spent more scanning time on structural/abstract features. A group by session interaction showed a change of viewing strategy in the artists, who viewed more objects and human features in the memory task session. A verbal test of recall memory showed no overall difference in the number of pictures remembered, but the number of correctly remembered pictorial features was significantly higher for artists than for the artistically untrained viewers, irrespective of picture type. No differences in fixation frequencies/durations were found between groups across sessions, but a significant task-dependent-group by session interaction of fixation frequency/duration showed that the artistically untrained participants demonstrated repetition effects in fewer, longer fixations with repeated viewing, while the opposite pattern obtained for the artists.