INFORMATION PROCESSING AS A FUNCTION OF SPEED VERSUS ACCURACY

48 Ss performed a stimulus categorization task under either speed or accuracy conditions. RT was a linear function of central processing uncertainty (Hc), RT = A + B(Hc). Speed conditions resulted in a lesser value of A than accuracy conditions. B was independent of speed vs. accuracy. Additional analyses indicated A was linearly related to accuracy level (information transmitted, Ht): A = C + D(Ht). C was interpreted as initial encoding plus decoding time, D as time to sample encoded information, and B as central processing time. The results are consistent with statistical decision models and support the SCAN mechanism proposed by Sperling. Most importantly, the results locate Hick's law in the preprocessing stage of a human information-processing paradigm. (17 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.