scholarly journals Perceptual selectivity and the fate of unemphasized information in a stimulus complex

1977 ◽  
Vol 5 (3) ◽  
pp. 347-354 ◽  
Author(s):  
Donald Homa ◽  
Bruce Coury
Keyword(s):  
Stimulus Complex

scholarly journals Second-Order Olfactory and Visual Learning in the Optic Tectum of the Goldfish

1940 ◽  
Vol 17 (4) ◽  
pp. 416-434
Author(s):  
F. K. SANDERS
Keyword(s):  
Optic Tectum ◽  
Carassius Auratus ◽  
Visual Learning ◽  
Second Order ◽  
Olfactory Stimulus ◽  
Preliminary Training ◽  
Anterior Border ◽  
Goldfish Carassius Auratus ◽  
Stimulus Complex ◽  
Made In

1. The goldfish (Carassius auratus) learns to swim to concealed food when an illuminated disk is presented. 2. The presentation of an olfactory stimulus at the same time as the optic stimulus, during reinforcement of this visual learning, results in the addition of the olfactory stimulus to the stimulus complex necessary to call forth the learned reaction. 3. Five animals learned to react to a situation in which--after preliminary training with an optic stimulus with food as reward--amyl acetate was given as olfactory stimulus and the optic stimulus as reward. This effect is termed second-order learning. It is comparable to second-order conditioned reflexes. 4. In four animals trained in this way operations involving removal of large areas of the optic tectum, or cuts made at its anterior border, caused disturbances in the second-order learning. 5. There exists, therefore, in the Teleostean optic tectum a mechanism capable of second-order olfactory-optic learning. 6. The connexion between the telencephalic primary olfactory centre and the tectum involved in this learning passes into the tectum at its anterior border, since cuts made in this region interfered with the learning while leaving a great deal of the tectum intact.

Stimulus Intensity and Spatiality in Tactile Temporal Numerosity Discrimination

Perception ◽  
1974 ◽  
Vol 3 (3) ◽  
pp. 297-302 ◽  
Author(s):  
E C Lechelt
Keyword(s):  
Spatial Variation ◽  
Signal Intensity ◽  
Presentation Rate ◽  
Middle Finger ◽  
Absolute Judgment ◽  
Numerosity Discrimination ◽  
Multiple Loci ◽  
Stimulus Complex ◽  
Left Middle

The role of signal intensity in tactile temporal numerosity discrimination was investigated for limited conditions of signal number and presentation rate. Trains of 5 to 18 mechanical ‘taps’ were presented at rates of 6, 8, 10, 12, or 15 s−1 to the ball of the left middle finger at either 75 or 125 V (15 or 20 dB SL, respectively). Trains of signals of greater intensity were counted reliably more accurately. Results from this spatially static arrangement are compared to those obtained under conditions of spatial variation where signals of identical intensity were delivered to multiple loci instead of to a single locus. It is concluded that the absolute judgment of the number of tactile signals in a train is a very labile process and highly dependent upon, and specific to, the physical characteristics—temporal, spatial, and intensive—of the stimulus complex.

Field Independence in Concept Attainment

1968 ◽  
Vol 27 (2) ◽  
pp. 635-642 ◽  
Author(s):  
Louis S. Dickstein
Keyword(s):  
High Field ◽  
Cognitive Capacity ◽  
General Intelligence ◽  
Field Independence ◽  
Concept Attainment ◽  
Low Field ◽  
Stimulus Complex ◽  
Field Independent ◽  
Stimulus Materials

Concept-attainment tasks in which the stimulus materials are composed of several perceptual attributes appear to require differentiation of the stimulus complex or the cognitive capacity of field independence. High and low field-independent females were compared on performance of a concept-attainment task. The high field-independent Ss were significantly more efficient as measured by number of choices to solution, number of incorrect verbalizations, and thoroughness with which attributes were tested. These Ss also demonstrated greater readiness to accept the irrelevance of attribute values of an initial exemplar of the concept. General intelligence was ruled out as a possible explanation of these differences.

Onset and offset of the Diazepam stimulus complex

1982 ◽  
Vol 17 (6) ◽  
pp. 1171-1174 ◽  
Author(s):  
Trond Haug ◽  
K. Gunnar Götestam
Keyword(s):  
Stimulus Complex

Further Studies of Overlearning and Position Reversal Learning

1964 ◽  
Vol 14 (2) ◽  
pp. 380-382 ◽  
Author(s):  
M. R. D'Amato ◽  
Donald Schiff
Keyword(s):  
Reversal Learning ◽  
Incorrect Response ◽  
Choice Response ◽  
Illumination Change ◽  
Incorrect Choice ◽  
Visual Cue ◽  
Reversal Effect ◽  
Stimulus Complex ◽  
Position Response

The effects of extensive overtraining on position reversal were studied in 2 experiments in which the stimulus complex associated with the choice response was manipulated. In Exp. I a visual cue (brightness) was correlated with the position response. In Exp. II the stimulus consequences of an incorrect response were made highly discriminable by associating an abrupt illumination change with an incorrect choice. Despite these modifications the overlearning reversal effect failed to occur in both experiments, verifying a number of previous reports.

CS termination and the response strength acquired by elements of a stimulus complex.

1959 ◽  
Vol 58 (5) ◽  
pp. 363-368 ◽  
Author(s):  
Delos D. Wickens ◽  
Henry A. Cross ◽  
Robert M. Morgan
Keyword(s):  
Response Strength ◽  
Stimulus Complex
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