• Ivana Pavlinac Dodig, Dona Krišto, Linda Lušić Kalcina, Renata Pecotić, Maja Valić, and Zoran Đogaš.
• Zoran Đogaš, Department of Neuroscience and Split Sleep Medicine Center, University of Split School of Medicine Šoltanska 2, 21000 Split, Croatia, zdogas@gmail.com.
• Croat. Med. J. 2020 Apr 30; 61 (2): 82-92.

AimTo assess age- and gender-associated differences in cognitive and psychomotor abilities measured by the Complex Reactionmeter Drenovac (CRD-series) tests.MethodsThis cross-sectional study, conducted between 2009 and 2019, enrolled 3420 participants (2012 women) in the age ranging from 18 to 88 years. The participants solved three CRD-series chronometric tests: discrimination of the light signal position (CRD311), complex psychomotor coordination (CRD411), and simple arithmetic operations (CRD11). We analyzed total test solving time (TTST), minimum single task solving time (MinT), number of errors, initial dissociation, and start, end, and total ballasts as measures of wasted time in the first half of the test, second half of the test, and total test time, respectively.ResultsAge was positively associated with MinT and TTST in all used tests (P<0.001), while initial dissociation, start ballast, and end ballast significantly increased with age (P<0.001). On the CRD11 test, men had shorter TTST than women (P=0.012), shorter start, end, and total ballasts (P<0.001), and made fewer errors than women (P<0.001). On the CRD311 test, women had shorter start (P=0.002), end, and total ballast (P<0.001) than men. On the CRD411 test, men performed better than women on all variables (P<0.001).ConclusionDecreased cognitive and psychomotor abilities measured by the CRD-series tests were associated with advanced age. Men performed better than women on simple arithmetic and complex psychomotor coordination tests, whereas women lost less time on the test of light signal position discrimination.

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