Perception of scene layout from optical contact, shadows, and motion

Kersten et al (1997 Perception 26 171-192) found that the perceived motion of an object in a 3-D scene was determined by the motion of a shadow. In the present study, we compared the effect of a shadow to that of a second object on the ground in determining the perceived position in depth of a floating object in both dynamic and stationary scenes. Changing the second (lower) object from textured to dark increased the influence of the second object on the judged position of the first object. Giving the second object zero thickness had this effect only if it was also dark. Variations in the height of the floating object were important with a second object but not with a shadow, in motion scenes. With alternative shadows present, the position of the floating object was determined primarily by matching speeds, with matching sizes as a secondary factor. These results show some similarities but important differences between the effect of a second object and that of a shadow.     

Mapping the intimate relationship mind: comparisons between three models of attachment representations

This study compared three models of how attachment working models might be cognitively represented. Model 1 posits that attachment representations consist of a single global working model summarizing attachment across specific relationships and domains. Model 2 proposes three independent working models for the relationship domains of family, platonic friendships, and romantic partners. Model 3 postulates that specific relationship models are nested under relationship domain representations that are, in turn, nested under an overarching global working model. Participants completed standard attachment scales for the relationship domains of family, platonic friendships, and romantic partners and also provided attachment ratings for three specific relationships within each domain. As expected, confirmatory factor analyses showed that Model 3 attained the best fit, regardless of analysis strategy, measurement strategy, gender, and relationship status. Implications are discussed.     

Feasibility of telecognitive assessment in dementia

Videoconferencing (VC) technology has been used successfully to provide psychiatric services to patients in rural and otherwise underserved settings. VC-based diagnostic interviewing has shown good agreement with conventional face-to-face diagnosis of dementia in several investigations, but extension of this technology to neurocognitive assessment has received little attention. To this end, the authors administered a brief battery of common neuropsychological tests via VC technology (telecognitive) and traditional face-to-face methods to 14 older persons with mild cognitive impairment (MCI) and 19 persons with mild to moderate Alzheimer's disease (AD). Highly similar test scores were obtained when participants were tested in-person or via VC. Telecognitive assessment appears to be a valid means to conduct neuropsychological evaluation of older adults with cognitive impairment. Furthermore, continued development of VC technology has implications for expanding neuropsychological assessment options in under-served populations.     

Etiology of preschool behavior problems: Contributions of temperament attributes in early childhood

The present study was conducted to examine the contributions of early appearing temperament attributes to toddler and preschool‐age behavior problems. High levels of negative emotionality and low levels of effortful control were linked to both externalizing and internalizing difficulties. All fine‐grained dimensions of negative affect were concurrently associated with internalizing problems whereas relations between components of negative affect and externalizing were observed only for frustration, sadness, and low falling reactivity. Higher surgency was associated with increased risk for externalizing behaviors whereas low surgency increased the likelihood of internalizing problems. Trait‐by‐trait moderation occurred, such that negative emotionality was most closely related to behavior problems when orienting/regulatory capacity or effortful control was low or when infant surgency was high. Results of this study have implications for theory linking temperament and psychopathology, and clinical applications utilizing temperament assessment to prevent behavior problems.