Frequency ratios and the perception of tone patterns

We quantified the relative simplicity of frequency ratios and reanalyzed data from several studies on the perception of simultaneous and sequential tones. Simplicity of frequency ratios accounted for judgments of consonance and dissonance and for judgments of similarity across a wide range of tasks and listeners. It also accounted for the relative ease of discriminating tone patterns by musically experienced and inexperienced listeners. These findings confirm the generality of previous suggestions of perceptual processing advantages for pairs of tones related by simple frequency ratios.     

A computer-based Personalized System of Instruction course in applied behavior analysis

Microcomputer laboratories are becoming more common in psychology departments because they provide an alternative instructional medium and a resource to help combat decreasing funding and increasing student:teacher ratios. By using microcomputers to perform the testing, we were able to conduct a Personalized System of Instruction course for 51 students, without the five proctors that would normally be required. Students had low rates of procrastination and positive attitudes toward the course, and none of the students dropped out. This paper describes how the course was organized and the hardware and software employed. Difficulties arising in the course and how they might be overcome are also discussed.     

Replenishing the “Fountain of Judaism”: Traditionalist Jewish Education in Interwar Poland

The unexpected revitalization of Polish Jewish traditionalism—Hasidic and non-Hasidic—is particularly visible in the realm of education. During the interwar period, a combined influx of pious refugees from the Soviet Union and generous American Jewish philanthropy bolstered traditionalist Jewish elementary schools (hadarim) and yeshivot. At the same time, traditionalists reformed those hitherto sacrosanct institutions in hopes of competing with emergent secularist Jewish movements while preserving an ostensibly authentic cultural core. Polish Jewish traditionalism was subtly transformed in the process, presenting a striking contrast with its more rigid “ultra-Orthodox” counterpart in neighboring Hungary and offering a viable alternative to secularist Jewish subcultures within Poland. This article highlights the surprising durability and flexibility of Poland’s traditionalist Jewish communities during a period usually conceived as one of secularist Jewish growth and traditionalist decline.     

A general account of selection: biology, immunology, and behavior.

Authors frequently refer to gene-based selection in biological evolution, the reaction of the immune system to antigens, and operant learning as exemplifying selection processes in the same sense of this term. However, as obvious as this claim may seem on the surface, setting out an account of "selection" that is general enough to incorporate all three of these processes without becoming so general as to be vacuous is far from easy. In this target article, we set out such a general account of selection to see how well it accommodates these very different sorts of selection. The three fundamental elements of this account are replication, variation, and environmental interaction. For selection to occur, these three processes must be related in a very specific way. In particular, replication must alternate with environmental interaction so that any changes that occur in replication are passed on differentially because of environmental interaction. One of the main differences among the three sorts of selection that we investigate concerns the role of organisms. In traditional biological evolution, organisms play a central role with respect to environmental interaction. Although environmental interaction can occur at other levels of the organizational hierarchy, organisms are the primary focus of environmental interaction. In the functioning of the immune system, organisms function as containers. The interactions that result in selection of antibodies during a lifetime are between entities (antibodies and antigens) contained within the organism. Resulting changes in the immune system of one organism are not passed on to later organisms. Nor are changes in operant behavior resulting from behavioral selection passed on to later organisms. But operant behavior is not contained in the organism because most of the interactions that lead to differential replication include parts of the world outside the organism. Changes in the organism's nervous system are the effects of those interactions. The role of genes also varies in these three systems. Biological evolution is gene-based (i.e., genes are the primary replicators). Genes play very different roles in operant behavior and the immune system. However, in all three systems, iteration is central. All three selection processes are also incredibly wasteful and inefficient. They can generate complexity and novelty primarily because they are so wasteful and inefficient.