scholarly journals Effects of preexposure and retention interval placement on latent inhibition and perceptual learning in a choice-maze discrimination task

2006 ◽  
Vol 34 (2) ◽  
pp. 193-201 ◽  
Author(s):  
L. G. De la Casa ◽  
William Timberlake
Keyword(s):  
Retention Interval ◽  
Perceptual Learning ◽  
Latent Inhibition ◽  
Discrimination Task

Retroactive Inhibition and Spontaneous Recovery in a Contingent Verbal Discrimination Task

1973 ◽  
Vol 32 (2) ◽  
pp. 443-450
Author(s):  
Donald J. Lehr ◽  
John F. Netti
Keyword(s):  
Retention Interval ◽  
Present Experiment ◽  
Discrimination Task ◽  
Spontaneous Recovery ◽  
Paired Associate ◽  
Verbal Discrimination ◽  
Frequency Theory ◽  
Retroactive Inhibition ◽  
Recall Data ◽  
Response Set

A primary purpose of the present experiment was to examine retroactive inhibition and spontaneous recovery by employing a task which combines aspects of paired-associate and verbal-discrimination learning. The design was a 3 × 2 independent groups factorial manipulating type of interpolated learning and length of the retention interval. There were 14 Ss in each of the six groups. Significant retroactive inhibition was found in one condition and an absolute temporal increase in List-1 recall in another; however, the interaction of Condition × Retention Interval was not significant. Acquisition and recall data are discussed primarily in terms of frequency theory and response-set interference.

Attenuation of Latent Inhibition by Post-Acquisition Reminder

1984 ◽  
Vol 36 (1b) ◽  
pp. 53-63 ◽  
Author(s):  
Wesley J. Kasprow ◽  
Doreen Catterson ◽  
Todd R. Schachtman ◽  
Ralph R. Miller
Keyword(s):  
Conditioned Stimulus ◽  
Retention Interval ◽  
White Noise ◽  
Latent Inhibition ◽  
Conditioning Phase ◽  
Retrieval Failure ◽  
Reminder Treatment ◽  
Lick Suppression ◽  
Treatment Shock

Using lick suppression by water-deprived rats as an associative index, white noise-footshock pairings resulted in less manifest conditioning when repeated non-reinforced presentations of the white noise preceded conditioning than when no stimulus pre-exposure was given, i.e., latent inhibition was observed. However, the latent inhibition deficit was reduced in animals who received as a reminder treatment shock-alone presentations in another context during the retention interval. Animals conditioned without prior stimulus pre-exposure and those exposed to the white noise and shock unpaired during the conditioning phase of the study showed no change in lick suppression as a result of the reminder treatment. These results suggest that the behavioural deficit produced by non-reinforced pre-exposure to the to-be-conditioned stimulus arises at least in part from a reversible retrieval failure rather than a lack of acquisition.

scholarly journals Retention of a Brightness Discrimination Task in Paramecia, P. caudatum

2013 ◽  
Vol 26 (3) ◽  
Author(s):  
Catherine M Mingee
Keyword(s):  
Nervous System ◽  
Retention Interval ◽  
Present Experiment ◽  
Discrimination Task ◽  
Brightness Discrimination ◽  
Specific Location ◽  
Minute Interval ◽  
Brightness Discrimination Task

Previous research into the possibility of learning in paramecia in this laboratory has shown that these organisms can learn to go to and remain in a specific location based on cathode shock reinforcement. The present experiment was designed to determine whether paramecia could retain (remember) the learned brightness discrimination task. The results indicate that the retention interval for this task in paramecia is shorter than 1 minute. It is possible that paramecia can remember this task for longer than a second but shorter than the 1-minute interval that was used during test. It is also possible that remembering for more than a few seconds requires a nervous system, which paramecia do not have.

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