Selective encoding from multielement visual displays

When a multiletter display is preceded by a bar designating one of the letters for report, reaction time (RT) to voice the indicated letter decreases. Previous research had indicated that the efficiency of this selective mechanism decreases as the number of display elements increases. Two experiments were conducted to determine whether the effect of display size could be eliminated when the indicator precedes the display at long intervals. Results indicated that the display size effect was maintained. The results could not be attributed to eye movements, but were interpreted in terms of a central encoding mechanism that is limited in its precision of localization and exclusion.     

The extent of processing of noise elements during selective encoding from visual displays

Circular visual displays of 12 elements, consisting of A, H, M, and U, were presented to S. She responded with a lever movement in one direction if a given letter designated by a bar indicator was a member of the set A-U and in the opposite direction if it was from the other set. The principal experimental variables were the SOA by which the indicator preceded the display and whether the target letter was flanked by letters of the same or opposite set. The results indicated that the interference produced by noise letters is primarily on the response as opposed to the processing side. Also, there is a limit to the precision of selective attention in the visual field. The interference of opposite-set letters was inversely proportional to their distance from the target.     

Spatial selectivity in visual search

To what extent does successful search for a target letter in a visual display depend on the allocation of attention to the target’s spatial position? To investigate this question, we required subjects to discriminate the orientation of a briefly flashed U-shaped form while searching for a target letter. Performance operating characteristics (POCs) were derived by varying the relative amounts of attention subjects were to devote to each task. Extensive tradeoffs in performance were observed when the orientation form and target letter occurred in nonadjacent display positions. In contrast, the tradeoff was much more restricted when the two targets occurred in adjacent positions. These results suggest that the interference between simultaneous visual discriminations depends critically on their separation in visual space. Both visual search and form discrimination require a common limited-capacity visual resource.     

A method for studying the analysis of aspects of the patient's experience of the relationship in psychoanalysis and psychotherapy

We have described a coding scheme for obtaining an objective account of the analysis of resisted aspects of the patient's experience of the relationship with the therapist in single, audio-recorded sessions of psychoanalysis and psychotherapy. The focus is on what is often regarded as an important first step in the analysis of transference: the identification and exploration of the preconscious points of attachment of transference ideas in the here-and-now. Related to the scheme is the view that there is generally a plausible basis in the here-and-now for the patient's ideas about the therapist. The implications of that view for the concept of transference are discussed. Future directions for research are noted, including improving the reliability of the scheme and testing various hypotheses regarding how the particular step in technique assessed by the method affects other aspects of the process and outcome.     

Acoustic augmentation and inhibition of the human eyeblink

The human eyeblink elicited by a mechanically produced tap to the glabella was inhibited by a mild acoustic stimulus presented 200 msec prior to the tap and was augmented when the same acoustic stimulus was presented simultaneously with the tap. Monaural presentation of the acoustic stimulus prior to the tap yielded more reflex inhibition than when that same stimulus was presented binaurally. Binaural presentation of the acoustic stimulus simultaneously with the tap yielded more reflex augmentation than when that same stimulus was presented monaurally. These findings lend credence to the proposition that reflex inhibition and reflex augmentation are mediated by separate neural pathways.