Information integration in judgements of time to contact

Time to contact (TTC) is specified optically by tau, and studies suggest that observers are sensitive to this information. However, TTC judgements also are influenced by other sources of information, including pictorial depth cues. Therefore, it is useful to identify these sources of information and to determine whether and how their effects combine when multiple sources are available. We evaluated the effect of five depth cues on TTC judgements. Results indicate that relative size, height in field, occlusion, and motion parallax influence TTC judgements. When multiple cues are available, an integration (rather than selection) strategy is used. Finally, the combined effects of multiple cues are not always consistent with a strict additive model and may be task dependent.     

A case of hysteria, with a note on biology

Psychoanalysis recently has shown interest in the data of neurobiology. This interest has been fostered by the realization that a model of Cartesian mind-body dualism is inadequate to current observation and knowledge. Despite the theoretical appeal of integrating knowledge from the two fields, there have been few attempts at correlation in specific clinical situations. This paper presents a case of hysteria in which the physical manifestations of hyperprolactinemia, galactorrhea, amenorrhea, and infertility are considered in relation to both the brain regulation of prolactin and to unconscious fantasy, motivation, and conflict. Some of the intriguing possibilities and limitations of research at the frontier of psychoanalysis and neurophysiology are discussed.