Examines issues associated with the design of and statistical inferences from embedded experiments which vary the questionnaire content into sample surveys of broad populations. Provides an example of context effects in attitude surveys, a summary, and conclusions. (RT)

Discussed is the question of whether "heavy" neutrinos really do exist based on the evidence supplied by four research groups. The implications of its existence on the disciplines of particle physics, astrophsyics, and cosmology are discussed. Background information on the different types of neutrinos is provided. (KR)

Discussed is the way in which a limited number of astronomy research initiatives were chosen and prioritized based on a consensus of members from the Astronomy and Astrophysics Survey Committee. A list of recommended equipment initiatives and estimated costs is provided. (KR)

Reports results of a study for NSF on the scientific instrumentation needs of research universities. Examines current status of scientific instruments in 16 major research universities, six government laboratories, and nine commercial laboratories; and identifies factors that facilitate or impede their acquisition, use, and development. (CS)

Reports results of an experiment involving a hydranencephalic infant lacking cerebral hemispheres and a normal twin in testing for associative learning. Cardiac orienting responses to stimulus omission indicated that learning had taken place in both infants. (CS)

Discussed is wavelet theory, which provides ways to rearrange data to reveal features of a physical or mathematical system which might otherwise be hidden. This theory is compared to fourier analysis and the advantages of wavelet theory are stressed. Applications of this technique are suggested. (CW)

Discussed is the discovery which may help to explain epidermal growth factor effects on the cell skeleton. The role of a protein called profilin in the regulation of the microfilament system is described. (CW)

Advances in the genetics and cell biology of muscle development are discussed. In-vitro analysis of the renaturation, polymerization, and three-dimensional structure of the purified proteins involved is described. (CW)

Reviews a study on deaf native sign language. Indicates that the modification of natural perceptual categories after language acquisition is not bound to a particular transmission modality, but rather can be a more general consequence of acquiring a formal linguistic system. (Author/SK)

Discussed are the behaviors of particles and energies in the magnetic fields of neutron stars. Different types of possible research using neutron stars as a laboratory for the study of strong magnetic fields are proposed. (CW)

Describes an experiment in which a subject spent more than 230 hours of practice in a laboratory and was able to increase his memory span from 7 to 79 digits. The results suggest that practice with an appropriate mnemonic system can increase memory performance. (Author/SA)

Presented is experimental evidence that humans develop strong preferences for objects that become familiar through repeated exposure, even when the exposures are so degraded that they cannot be discriminated as stimuli previously seen. Implications are made regarding other studies where affective discriminations are made with very little stimulus…

The evolutionary paths by which the characteristic properties of sex chromosomes may have evolved are reviewed. The evolution of the X and Y chromosomes from a cosexual ancestor is discussed. (CW)

Provides the statistics and a brief analysis of the recent elementary and secondary science and math scores on the 1992 National Assessment of Educational Progress achievement test. (ZWH)

The body of data indicating sex differences in the brains of almost every mammalian family examined so far (rodents, birds, monkeys, and human beings) is reviewed. The differences in the hypothalamus, thalamus, corpus callosum, anterior commissure, and the hippocampus are described. (KR)