Technical considerations regarding the short (dit)-long (dah) key press paradigm.

Area of Science:

• Cognitive Psychology
• Human Motor Control
• Experimental Psychology

Background:

• Previous research suggested a correlation between longer reaction times and longer response durations.
• This finding, however, faced replication challenges in subsequent statistically robust studies.
• The reliability of this effect under varying experimental conditions remained uncertain.

Purpose of the Study:

• To investigate the replicability of the reaction time-response duration relationship.
• To examine the influence of different knowledge of results (KR) arrangements on this effect.
• To determine the conditions under which the long-short effect is reliable.

Main Methods:

• An experiment was designed to test the effect using knowledge of results (KR) similar to previous studies.
• The experiment also included variations in KR arrangements to assess sensitivity.
• Statistical analysis was employed to evaluate the reliability of observed effects.

Main Results:

• The study failed to replicate the long-short effect when KR conditions matched Kerr (1979).
• A reliable long-short effect was observed, however, under different KR arrangements.
• This indicates a significant, unexpected sensitivity to the type of KR provided.

Conclusions:

• The previously reported relationship between reaction time and response duration is not consistently reliable.
• The effect's presence or absence is highly dependent on the specific knowledge of results used.
• Findings necessitate caution when interpreting prior research utilizing this experimental paradigm.