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International Journal of Phytomedicine and Phytotherapy

Table 2 Demographic data and participant’s performance in various cognitive tasks in PEBL test battery

From: The effect of black tea on human cognitive performance in a cognitive test battery

  Black Tea (BT) Water (W) P value
Age Year 21.5 ± 1.26 20.88 ± 0.71 >0.1
IQ level   106.29 ± 23.34 100.71 ± 31.22 >0.1
Memory Span Average block 5.31 ± 0.89 4.90 ± 0.84 >0.1
Immediate Recall Memory Test No. of words retrieved 8.06 ± 0.32 7.75 ± 0.22 >0.1
Delayed Recall Memory Test No. of words retrieved 7.56 ± 0.93 6.50 ± 0.37 >0.1
No. of words failed to recall 1.12 ± 0.15 1.37 ± 0.32 <0.05
Berger’s Card Sorting Test Persev_error 8.81 ± 5.74 9.38 ± 5.99 >0.1
RT (ms) 1671 ± 319 1935 ± 372 <0.05
Simple Reaction Time Task to measure Sustained Attention RT (ms) 333 ± 2 361 ± 2 <0.05
Visual Search (Target identification) RT (ms) 984 ± 32 999 ± 37 >0.1
Visual Search (Target location) RT (ms) 925 ± 12 972 ± 28 <0.05
  1. Total subjects (n = 32); water (n = 16); Black Tea (n = 16); RT Reaction Time; Data were represented as Mean ± SEM; RTs were shown in millisecond (ms