There is a conflict in the literature on selective attention. Five experiments were conducted to resolve this conflict, and all involved a comparison of tachistoscopic recognition when alternatives were either presented beforehand or not. (Editor/RK)

Attempts to settle the question of whether reading units are ever larger than letters and considers the variables expected to influence the size of the reading unit. (Author/RK)

Reports some additional research that may resolve questions about the meanings accessed in recognizing ambiguous words. (Author/RK)

Nonspeech stimuli were varied along two dimensions--intensity and rise time. In a series of speeded classification tasks, subjects were asked to identify the stimuli in terms of one of these dimensions. (Editor)

Demonstrates that preexposure to uncorrelated presentations of noises and shocks when rats are not permitted to respond interferes with the acquisition of both conditioned emotional response and signaled punishment suppression. (Author/RK)

This article describes an experiment designed to define the difficulties perceived by learners in verbal learning tasks. (Text is in Spanish.) (CLK)

The present experiment showed that material which is passively or mechanically read is, at least in part, retained. In addition, material which is passively read influences the learning of subsequent material. (Author)

The present experiment supports the hypothesis that the letter is the basic perceptual unit in letter, nonword, and word identification. (Author)

The purpose of this study was to extend the functional learning paradigm to the case where the relation to be learned is not stationary. (Author)

Two experiments were designed to distinquish between interpretations of extinction based on stimulus variation and interpretations based on secondary reinforcement. (Author)

The present article is concerned with the ways in which Ss are able to make use of organizational cues in order to facilitate retrieval of information from memory. (Author)

The separate effects of stimulus and response relative frequency were studied in two choice reaction time tasks containing many: 1 stimulus-response (S-R) mappings and 2 levels of S-R compatability. (Editor)

The present experiment was intended to assess the effects of pronunciation on frequency judgment variability in a between-Ss design. (Author)

The present experiment was designed to investigate recognition memory processes in a task in which the items to be recognized were stored in long-term memory (LTM), in short-term memory (STM), or in both memory stores. (Author/RK)

The Sperling 1960 procedure of full and partial report was used with tachistoscopically presented arrays of 100-msec. duration in two separate experiments. (Editor)