Reports on an experiment designed to study the role of letter stems in the identification of printed words. The stemmed letters b,d,g,h,l,p and t were used. Results showed that the suppression of the letter's body has more detrimental effects on identification than the suppression of the stem. (Author/RM)

The suggestion of Krueger (1973) and others that wholistic processes underlie certain perceptual judgments is taken up in this paper. (Editor)

This study was based on that of Jorgensen and Kintsch (1973) regarding verification time and ease of imagery of sentences. The present study concluded that the results of Jorgensen and Kintsch do not distinguish the effects of rated imagery on reaction time from the effects of semantic relatedness and semantic complexity. (Author/RM)

Elderly subjects and college-age subjects were compared on the strategy used to answer a question based on information in memory. The two strategies studied were direct retrieval and plausibility. The first experiment tested the hypothesis that older subjects will rely on the plausibility strategy more than young subjects. A second experiment…

The relationships between reaction time (RT), movement time (MT), visual hemi-space preferences in RT and MT, and the Peabody Picture Vocabulary Test (PPVT) were investigated in order to evaluate reaction time as a measurement practice with very young children. The sample was composed of 49 white, middle-class children ranging in age from 24 to 77…

The purpose of this article is to introduce a task and methodology that will enable the measurement and study of the elementary processes underlying imagery. (Author)

The study involving 11 reading disabled and 9 normal elementary school children evaluated the relative efficacy of practice with feedback on accuracy and practice with feedback on both accuracy and response rate related to response speed on word reading performance. Ss were exposed to randomized blocks of 10 high frequency words and 20 words which…

Research was conducted to investigate the effects of contextual information on the speed and accuracy with which two general classes of inferences were verified by readers. These types of inferences were based on information in conversations that were or were not topically ambiguous, depending upon the amount of available contextual information.…

This dissertation reports the development and application of a new methodology for the measurement and evaluation of interactive computing, applied to either the users of an interactive computing system or to the system itself, including the service computer and any communications network through which the service is delivered. The focus is on the…

The results of this study support the assumption that long-term memory is not modified when a person performs a task utilizing an automatic process. Twelve university students performed an incidental learning task which consisted of scanning lists of words for either their own name, first names other than their own, words representing a unit of…

Two procedures were investigated in an attempt to decrease the variability of overlearning response latencies in a study-test paradigm, paired-associate task matching CVC's with response keys: (1) self-pacing the task by presenting test trial stimuli whenever the subject pressed a "home" key; and (2) instructing and shaping subjects to keep home…

A series of four experiments was performed based on a model of human information processing. The model postulates four stages in the processing of an external stimulus: encoding (stage 1), central processing (stage 2), response selection, e.e. decoding (stage 3), and response execution (stage 4). The total reaction time can be decomposed into two…

A model was developed for teaching beginning shorthand through the use of computer-assisted instruction (CAI). The model was based on the supposition that incorrect responses decrease the efficiency of the learning process. A response not completed within the amount of time required for a correct response was predicted to be incorrect. In the…

Four experiments are reported which employ a recall-reaction time paradigm. The experiments are designed to establish the baseline effects in the paradigm, determine which of these effects should be attributed to the retrieval stage of processing and investigate the effect of semantic memory in this task. (Author/DEP)

Two different experimental procedures were used to examine (a) information-processing differences between two groups of subjects (Cs versus Vs) identified by the form of their conditioned eyeblinks; (b) information-processing differences between the right and left cerebral hemispheres; and (c) parallels between hypothesized C-V differences and…