The Motive for Sensory Pleasure: Enjoyment of Nature and Its Representation in Painting,Music, and Literature

ABSTRACT Eight studies assessed the motive for sensory pleasure (MSP) involving a general disposition to enjoy and pursue pleasant nature‐related experiences and avoid unpleasant nature‐related experiences. The stated enjoyment of pleasant sights, smells, sounds, and tactile sensations formed a unitary construct that was distinct from sensation seeking, novelty preference, and need for cognition. MSP was found to be related to (a) enjoyment of pleasant nature scenes and music of high but not low clarity; (b) enjoyment of writings that portrayed highly detailed nature scenes; (c) enjoyment of pleasantly themed paintings and dislike of unpleasant paintings, as distinct from findings with Openness to Experience; (d) choice of pleasant nature scenes over exciting or intellectually stimulating scenes; (e) view duration and memory of artistically rendered quilts; (f) interest in detailed information about nature scenes; and (g) frequency of sensory‐type suggestions for improvement of a museum exhibit.     

High-speed 2-D and 3-D animation on the IBM PC/XT/AT

This article describes programs for performing high-speed two-dimensional (2-D) and three-dimensional (3-D) animation on IBM PC/XT/AT and compatible machines that use the color/graphics adapter. Machine language routines interfaced through BASIC allow the user to store screen images in memory as they are created by user software and then to display the sequence of images at rates of up to 60 frames per second. A BASICA 3-D graphics editor that can be used with the routines permits the user to create wire-frame objects and to move them about rigidly in conceptual space while projecting them onto the display screen. These programs should find application in the study of visual perception and cognition.     

Scan-display of high-resolution images using the Apple II

Two programs are presented for the scan-display of high-resolution images using the Apple II+ and Apple IIe. The first program permits the user to move a rectangular aperture about the video screen to reveal different portions of a stationary image. The second program scrolls an image vertically within a horizontal window, giving rise to the impression of an object moving behind a stationary slit. These programs should be useful in the study of anorthoscopic perception, motion perception, perceptual integration of successively displayed information and other topics in visual perception.     

Assessing auditory distance perception using perceptually directed action

Three experiments investigated auditory distance perception under natural listening conditions in a large open field. Targets varied in egocentric distance from 3 to 16 m. By presenting visual targets at these same locations on other trials, we were able to compare visual and auditory distance perception under similar circumstances. In some experimental conditions, observers made verbal reports of target distance. In others, observers viewed or listened to the target and then, without further perceptual information about the target, attempted to face the target, walk directly to it, or walk along a two-segment indirect path to it. The primary results were these. First, the verbal and walking responses were largely concordant, with the walking responses exhibiting less between-observer variability. Second, different motoric responses provided consistent estimates of the perceived target locations and, therefore, of the initially perceived distances. Third, under circumstances for which visual targets were perceived more or less correctly in distance using the more precise walking response, auditory targets were generally perceived with considerable systematic error. In particular, the perceived locations of the auditory targets varied only about half as much in distance as did the physical targets; in addition, there was a tendency to underestimate target distance, except for the closest targets.     

Sensitivity to shifts of a point stimulus: An instance of tactile hyperacuity

The sensitivity of the tactile sense to shifts in the position of a point stimulus was determined at four body loci: the index finger, forehead, belly, and back. Water-jet stimulation was used, a method which allows frictionless travel of a point stimulus over the skin. Three subjects were tested by means of the method of forced choice, with the task being to say whether the stimulus moved to the right or to the left. The shift threshold was defined as that shift excursion which gave rise to 75% correct responding. The basic finding was that shift thresholds were on the order of 10 to 30 times smaller than the corresponding two-point limens obtained by Weinstein (1968) for the same body loci. These unexpectedly small shift thresholds indicate an exquisite sensitivity of the cutaneous sense to rapid changes in position of a point stimulus. A physiological model is presented which accounts for the difference between localization and spatial resolution. nt]mis|This research was supported by Department of Health~ Education, and Welfare Grant 14-P-SS282/9 from the Social and Rehabilitation Services, NIH Research Grant R01-EY-00686 from the National Eye Institute, and the Smith-Kettlewell Eye Research Foundation.