CAMPBELL, B A <br/><br/>
The reinforcement difference limen (RDL) function for shock reduction.  [electronic resource] 

 -  Journal of experimental psychology  Oct 1956 
 - 258-62 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-1015 
<br/><br/><label>Standard No.: </label>10.1037/h0048706  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential Threshold<br/>Humans<br/>Learning<br/>Reinforcement, Psychology