Skip to Main Content
Table 1. 
Memory Tasks
 PlaceboSulpiridep ValueEffect Size
MLT learning phase 
 High reward 2.58 (0.22) 2.65 (0.20) .682 0.101 
 Low reward 1.66 (0.20) 1.75 (0.24) .582 0.136 
 Long duration 2.10 (0.21) 2.15 (0.22) .774 0.071 
 Short duration 1.90 (0.18) 1.98 (0.21) .643 0.115 
  
MLT retrieval phase 
 High reward 1.87 (0.19) 1.77 (0.18) .493 0.170 
 Low reward 0.99 (0.20) 1.09 (0.25) .613 0.125 
 Long duration 1.52 (0.16) 1.33 (0.19) .191 0.331 
 Short duration 1.05 (0.15) 1.20 (0.14) .225 0.306 
  
Finger tapping 
 Correctly tapped sequences 
  Learning phase 22.63 (1.40) 21.01 (1.51) .167 0.351 
  Retrieval phase 26.00 (1.71) 23.41 (1.72) .069 0.474 
  Absolute difference 3.37 (0.83) 2.40 (0.68) .416 0.203 
  % of learning 115.47% (3.72%) 112.18% (3.63%) .584 0.136 
  
Error rates 
 Learning phase 0.07 (0.02) 0.13 (0.03) .089 0.439 
 Retrieval phase 0.09 (0.02) 0.07 (0.01) .483 0.174 
 Absolute difference 1.71 (2.08) −5.71 (2.61) .059 0.493 
  
Control sequence 
 Correct sequences 18.65 (1.70) 18.69 (1.46) .982 0.006 
 Error rate in percent 9.85% (1.68) 9.31% (1.76) .809 0.059 
  
Word pairs 
 Blocks to criterion 1.59 (0.17) 1.76 (0.16) .188 0.334 
 Learning phase 29.59 (0.96) 31.47 (0.88) .052 0.510 
 Retrieval phase 28.06 (1.59) 29.47 (1.22) .380 0.219 
 Absolute difference −1.53 (0.98) −2.00 (0.78) .729 0.086 
 % of learning 94.09% (3.57%) 93.57% (2.61%) .915 0.026 
 PlaceboSulpiridep ValueEffect Size
MLT learning phase 
 High reward 2.58 (0.22) 2.65 (0.20) .682 0.101 
 Low reward 1.66 (0.20) 1.75 (0.24) .582 0.136 
 Long duration 2.10 (0.21) 2.15 (0.22) .774 0.071 
 Short duration 1.90 (0.18) 1.98 (0.21) .643 0.115 
  
MLT retrieval phase 
 High reward 1.87 (0.19) 1.77 (0.18) .493 0.170 
 Low reward 0.99 (0.20) 1.09 (0.25) .613 0.125 
 Long duration 1.52 (0.16) 1.33 (0.19) .191 0.331 
 Short duration 1.05 (0.15) 1.20 (0.14) .225 0.306 
  
Finger tapping 
 Correctly tapped sequences 
  Learning phase 22.63 (1.40) 21.01 (1.51) .167 0.351 
  Retrieval phase 26.00 (1.71) 23.41 (1.72) .069 0.474 
  Absolute difference 3.37 (0.83) 2.40 (0.68) .416 0.203 
  % of learning 115.47% (3.72%) 112.18% (3.63%) .584 0.136 
  
Error rates 
 Learning phase 0.07 (0.02) 0.13 (0.03) .089 0.439 
 Retrieval phase 0.09 (0.02) 0.07 (0.01) .483 0.174 
 Absolute difference 1.71 (2.08) −5.71 (2.61) .059 0.493 
  
Control sequence 
 Correct sequences 18.65 (1.70) 18.69 (1.46) .982 0.006 
 Error rate in percent 9.85% (1.68) 9.31% (1.76) .809 0.059 
  
Word pairs 
 Blocks to criterion 1.59 (0.17) 1.76 (0.16) .188 0.334 
 Learning phase 29.59 (0.96) 31.47 (0.88) .052 0.510 
 Retrieval phase 28.06 (1.59) 29.47 (1.22) .380 0.219 
 Absolute difference −1.53 (0.98) −2.00 (0.78) .729 0.086 
 % of learning 94.09% (3.57%) 93.57% (2.61%) .915 0.026 

Mean (±SEM) values are provided for the sulpiride and placebo conditions. Motivated learning task (MLT): d′ is provided for performance during the learning phase and the retrieval phase. Finger tapping task: the average number of correctly tapped sequences per 30-sec trial and error rates (in percentage of total tapped sequences) for finger sequence tapping during the last three 30-sec trials of the learning phase, the three trials during the retrieval phase, and for the untrained control sequence. In addition, the absolute difference (retrieval–learning) and percentage of learning (Retrieval/Learning × 100) are provided. Word-pair task: The total amount of recalled words is given for the criterion trial during the learning phase and the recall trial during the retrieval phase. In addition, the absolute difference (retrieval–learning) and percentage of learning (Retrieval/Learning × 100) are provided. Cohen's d is provided as an effect size statistic.

Close Modal

or Create an Account

Close Modal
Close Modal