Indirect interception actions by blind and sighted perceivers: The role of modality and tau

Vernat, J.‐P. & Gordon, M.S. (2011). Indirect interception actions by blind and sighted perceivers: The role of modality and tau. Scandinavian Journal of Psychology 52, 83–92. Acoustic and visual interceptive actions were tested in this research by comparing the performance of blind, blind‐folded, and sighted individuals. An indirect interception method was employed in which the participant had to roll an intercepting ball towards a moving target on a perpendicular track. The interception task used conditions that varied the speed, rolling distance, and target size/intensity. While performance was highly consistent and accurate for visual participants in this research, the blind and blind‐folded participants demonstrated much more performance variability in response to changes in speed and distance. Manipulation of target size and intensity did not affect judgments, however performance tended to be more accurate at shorter distances and with faster target speeds. Results from this research are discussed in terms of their implications for tau in acoustic interception, and the use of spatial and temporal cues for guiding interceptive actions.     

The structure of self–other overlap and its relationship to perspective taking

Two studies tested whether “self–other overlap” is a multidimensional construct, with only some dimensions affected by perspective taking. In Study 1, participants (n = 132) completed several previously used measures of self–other overlap for their best friend and acquaintance. Factor analyses revealed 2 distinct dimensions of self–other overlap—perceived closeness and overlapping representations. Perceived closeness but not overlapping representations was generally associated with relationship quality. Study 2 (n = 118) manipulated perspective taking of a stranger. Results replicated a factor structure similar to Study 1, and found that perspective taking had different effects on the 2 dimensions of overlap. These results are discussed with regards to the debate over self–other overlap as a mediator of perspective taking's pro‐social effects.     

Decision Development in Computer-Assisted Group Decision Making

New computer technologies to aid group communication and decision making are becoming increasingly widespread. This study analyzes how one such technology, a group decision support system (GDSS), affected how group decisions developed over time. The study contrasted decision paths in groups using the GDSS with groups using the same procedural structures incorporated in the GDSS manually and with groups using no procedural structures. A flexible phase mapping method was employed to map group decision paths. The resulting set of seven decision paths varied in both sequence and number of decision phases. An optimal matching procedure was used to compute similarity measures among the 40 paths, and cluster analysis and multidimensional scaling were used to generate an empirical taxonomy of decision paths. Results indicated that the nature of decision paths varied both across the three conditions and within conditions. The decision path types were also related to three outcome variables: consensus change, perceived decision quality, and decision scheme satisfaction. Results indicated that those decision paths that most resembled logical normative sequences had superior outcomes to those that did not.     

COGNITIVE ENCODING PROCESSES: EVIDENCE FOR A GRAPHEMICALLY BASED SHORT-TERM MEMORY

Three competing models of word recognition processes currently receive psycholinguistic research support: direct encoding (i.e., word recognition proceeds from graphemes); indirect encoding (i.e., word recognition proceeds from a phonemic translation of graphemes); and dual access (i.e., word recognition can proceed from either graphemes or phonemes). Resolution of the conflict between these models has been hampered by methodological problems common to research techniques in this area. The two experiments reported in this study analyzes the competing models via the SLIP technique, which avoids those methodological problems. Support is yielded for the direct encoding model. Implications are discussed.