The relative effects of competence and likability on interpersonal attraction

Undergraduate students in Singapore (N = 80) learned about the competence (low vs. high) and likability (low vs. high) of a future interaction partner and indicated their attraction toward that stranger. The effect of likability was two times as large as that of competence. Because of the additive effects of the two manipulated factors on attraction, the authors interpreted the preference for lovable fools over competent jerks as an outcome of a generalized supremacy of likability over competence.     

Deterring Anger and Anger-Motivated Behaviors

Two experiments were carried out to explore an anger-reducing strategy based on Brehm's emotional intensity theory. According to this theory, anger can be reduced indirectly by interfering with the feeling of anger rather than by dealing directly with the source of anger. One strategy involves providing the angered person with a reason for feeling happy. We predicted that anger intensity would be reduced not only by a large reason for feeling happy, such as a large gift, but also by a small reason, like a tiny gift. A medium-size gift was expected to maintain anger at approximately its instigated level. Both experiments instigated anger by personal insult and then measured the intensity of felt anger and retaliation after either no further treatment, or a small, a moderate, or large irrelevant gift was presented. The results for felt anger and retaliation confirmed our theoretical expectations.     

Cognitive load of navigating without vision when guided by virtual sound versus spatial language

A vibrotactile N-back task was used to generate cognitive load while participants were guided along virtual paths without vision. As participants stepped in place, they moved along a virtual path of linear segments. Information was provided en route about the direction of the next turning point, by spatial language ("left," "right," or "straight") or virtual sound (i.e., the perceived azimuth of the sound indicated the target direction). The authors hypothesized that virtual sound, being processed at direct perceptual levels, would have lower load than even simple language commands, which require cognitive mediation. As predicted, whereas the guidance modes did not differ significantly in the no-load condition, participants showed shorter distance traveled and less time to complete a path when performing the N-back task while navigating with virtual sound as guidance. Virtual sound also produced better N-back performance than spatial language. By indicating the superiority of virtual sound for guidance when cognitive load is present, as is characteristic of everyday navigation, these results have implications for guidance systems for the visually impaired and others.     

Visual control of action without retinal optic flow

In everyday life, the optic flow associated with the performance of complex actions, like walking through a field of obstacles and catching a ball, entails retinal flow with motion energy (first-order motion). We report the results of four complex action tasks performed in virtual environments without any retinal motion energy. Specifically, we used dynamic random-dot stereograms with single-frame lifetimes (cyclopean stimuli) such that in neither eye was there retinal motion energy or other monocular information about the actions being performed. Performance on the four tasks with the cyclopean stimuli was comparable to performance with luminance stimuli, which do provide retinal optic flow. The near equivalence of the two types of stimuli indicates that if optic flow is involved in the control of action, it is not tied to first-order retinal motion.     

Perception of heading without retinal optic flow

How do we determine where we are heading during visually controlled locomotion? Psychophysical research has shown that humans are quite good at judging their travel direction, or heading, from retinal optic flow. Here we show that retinal optic flow is sufficient, but not necessary, for determining heading. By using a purely cyclopean stimulus (random dot cinematogram), we demonstrate heading perception without retinal optic flow. We also show that heading judgments are equally accurate for the cyclopean stimulus and a conventional optic flow stimulus, when the two are matched for motion visibility. The human visual system thus demonstrates flexible, robust use of available visual cues for perceiving heading direction.