Technical note on the joint receipt of quantities of a single good

The joint receipt of x and y is the fact of receiving them both. If x and y are objects that are valued, their joint receipt is valued as well. Assumming joint receipt is a binary operation that satisfies the conditions of extensive measurement, there is a numerical representation that is additive over joint receipt. We consider the case where x and y are quantities of the same infinitely divisible good. Different sets of assumptions are explored. Invariance with respect to multiplication proves to be interesting. Invariance with respect to addition yields a linear form. A relaxation of the latter yields an approximately linear form. Finally, we consider a non-commutative but bisymmetric joint-receipt operation with a representation arising from preferences over gambles.     

A thought on the nature of psychoanalytic theory

In this paper I suggest that much of recent experiment in analytic theory, even widely diverse approaches, has a common denominator the problem of the conceptual vacuum created by the shift away from a central creative position of the idea of psychic mechanisms. I try to illustrate, by comparing theories of Bion and George Klein, that this movement seems to point in the direction of considering now what is uniquely psychoanalytic about our theories. I content that what is unique about psychoanalytic theories is that they are involved in the experiential core-function of the applied science by becoming internalized and used symbolically to aid the analyst inwardly to endure persecutory anxiety and loss of the sense of objective reality, and so maintain the analytic position.     

Signal-detection analysis of luminance generalization in goldfish using latency as a graded response measure

ROC curves were determined from response latencies of goldfish in a single-stimulus generalization task. The resulting functions were similar to ROC curves obtained by rating methods with human Os.