摘要:

Following 30 days of reinforcement for the bar press response of two white rats on 30‐sec fixed‐interval (FI), a DRL component was added so that a minimal interresponse time (IRT) for the reinforced response, in addition to the FI variable, was necessary for reinforcement. Marked control over response rate by the superimposed DRL requirement was demonstrated by an inverse hyperbolic function as the DRL component was increased from 1 to 24 sec within the constant 30‐sec FI interval. Interresponse time and post‐reinforcement (post‐SR) “break” distributions taken at one experimental point (DRL = 24 sec) suggested that a more precise temporal discrimination was initiated by an SRthan by a response, since the relative frequency of a sequence of two reinforced responses appeared greater than that of a sequence of a non‐reinforced response followed by a reinforced one. This latter finding was confirmed with new animals in a follow‐up experiment employing a conventional 24

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-391

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-400

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

The effect of Pavlovian discrimination training with two stimuli upon subsequent learning of an operant discrimination involving those stimuli was studied. After preliminary lever press training, the lever was removed and thirsty rats received noncontingent pairings between S1(a tone or a clicker) and water reinforcements, whereas S2(a clicker or a tone) occurred always without reinforcement. This procedure presumably established S1as a positive CS for respondent behavior, whereas S2was established as an inhibitory CS. Following this training, the lever was reintroduced and the rats were trained on an operant (lever pressing) discrimination involving S1and S2. For the ConsistentSs, S1was the SDand S2the SΔin the operant discrimination; for the ReversedSs, S2served as SDand S1as SΔ. The ConsistentSs learned the operant discrimination significantly faster than did the ReversedSs. The result emphasizes the importance of respondents, conditioned to SDand SΔ, which modulate operant performance to these stimu

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-401

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

The effect of CER on DRL 16 was studied in four rats. AllSs showed complete CER suppression after five CER trials, together with some unconditioned post‐shock suppression. This post‐shock suppression showed complete recovery in allSs after 10 days of five CER trials per day, but complete CER suppression continued through

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-405

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-408

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

Three hooded rats were trained to bar press for variable‐ratio liquid reinforcement after which an electric shock was delivered following the response. Initially, the shock was presented on a FR 100 basis but the frequency was gradually increased until all responses were punished. Finally, a partial extinction procedure was conducted to determine if the shock resulted in increased bar pressing. No durable suppression of responding occurred, although one subject's rate was reduced during continuous shock. The overall trend for the three animals was one of increased responding. Changes in the pattern of responding were also observed suggesting that the suppressive effects of the punishment were largely restricted to the first response following reinforcement. Increased responding as a function of shock reintroduction during extinction was also observe

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-409

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

In the first five or six sessions on a DRL 20‐sec schedule of reinforcement there developed a stable performance characterized by a relatively constant conditional probability of occurrence (IRTs/op) of interresponse times (IRTs) of durations greater than 5 or 6 sec. Extinction and the level of deprivation changed both the overall rate of responding and the form of the function relating the duration of an IRT to its value of IRTs/op. The value of IRTs/op decreased more rapidly for short than for longer IRTs, resulting in the emergence of a finer discrimination of IRT duratio

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-415

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-422

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-423

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

ISSN:0022-5002    

DOI:10.1901/jeab.1964.7-425

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY