Discriminative stimulus location as a determinant of positive and negative behavioral contrast in the pigeon

Four pigeons were exposed to a series of two-component multiple schedules of reinforcement that ordinarily yield positive and negative behavioral contrast. The stimuli that signalled the component schedules were sometimes located on the response key and sometimes off. Positive behavioral contrast was observed only when the stimuli were on the key. Negative contrast was observed independent of stimulus location. These data suggest that positive and negative contrast may be causally unrelated, and support an account of contrast in terms of the summation of key pecks that are separately controlled by response-reinforcer and stimulus-reinforcer dependencies.     

Scanning processes and sentence recognition

This report summarizes an experiment designed to study the disruptive effects on immediate recall of interfering with the ability to scan ahead. Sentences were printed on paper tape which was pulled through a window, the size of which could be controlled. There were two exposure widths, three rates of tape movement, and three types of material which varied in length: equational and transitive sentences as well as random strings of words. Errors increase as the exposure width is decreased, and the magnitude of the disruptive effect is most marked for the longer sentences and the faster rate of presentation. A possible explanation is advanced emphasizing the likelihood that Ss store information in a sensory register and scan that register in order to segment sentences into phrases, phrases into words, and words into smaller functional units. As one limits exposure width, one interferes with the transfer of information into the sensory register and with the processing of information after it is stored in the register.     

Vagueness and incoherence: A reply to Burns

I would like to thank Terence Horgan, William Throop and especially my wife, Diane Schwartz, for helpful suggestions for improving this paper and for valuable and insightful discussions on the topic of vagueness. I would also like to thank Ithaca College for generously supporting the work on this paper with a Summer Research Grant.     

Verbal ability and mental processing speed

The notion that verbal ability is related to mental processing speed was examined using tasks that systematically varied in semantic content. Subjects’ reaction times were measured in five tasks involving arrow matching, physical identity word matching, or taxonomic identity word matching. The findings indicated that matching tasks using different decision rules and different stimuli were all related to verbal ability. In fact, reaction time for subjects required to judge whether two arrows pointed in the same direction was the best predictor of verbal ability. One explanation of the results is that speed of information processing (a general factor) may be the important component of verbal ability which is measured by seemingly different matching tasks.     

Patterns of emotional responses to affective situations: Relations among happiness,sadness, anger,fear, depression,and anxiety

Although emotion research and clinical practice often implicitly entail judgments about the patterns and situational appropriateness of a person's emotional reactions, we have little empirical knowledge of how emotions typically interrelate during various affective situations. To assess patterns of response to normative situations, a questionnaire was constructed and validated to include items primarily eliciting one of six emotions (happiness, sadness, anger, fear, depression, and anxiety) and one of three intensities (low, moderate, and high). A total of 216 persons rated one of four forms of the questionnaire on each of the six emotional categories. Each of the six types of situations generated significantly different patterns of emotion. As Izard (1972) predicted, depression situations elicited more complex patterns of emotion than sadness situations, including significantly more anger, fear, and anxiety. In contrast, anxiety situations did not elicit more complex patterns than fear situations. Rather, the evidence was more consistent with the conclusion that fear is a particular type of anxiety. Various other relations among specific emotions are discussed, as well as some subtle sex differences and intensity effects. The data highlight the sensitivity with which the assessment of patterns of emotions associated with specific situations can produce new information about the nature of affective experience.