Mihalis Doumas

Publications (3)4.88 Total impact

• Source

  Available from: Ann Lavrysen

  Article: The costs of taking it slowly: fast and slow movement timing in older age.

  Ralf Th Krampe, Mihalis Doumas, Ann Lavrysen, Michael Rapp
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  ABSTRACT: We investigated adult age-differences in timing control of fast vs. slow repetitive movements using a dual-task approach. Twenty-two young (M = 24.23 yr) and 22 older adults (M = 66.64 yr) performed three cognitive tasks differing in working memory load and response production demands and they tapped series of 550-ms or 2100-ms target intervals. Single-task timing was comparable in both groups. Dual-task timing was characterized by shortening of produced intervals and increases in drift and variability. Dual-task costs for both cognitive and timing performances were pronounced at slower tapping tempos, an effect exacerbated in older adults. Our findings implicate attention and working memory processes as critical components of slow movement timing and sources of specific challenges thereof for older adults.
  Psychology and Aging 12/2010; 25(4):980-90. · 2.73 Impact Factor
• Source

  Available from: Ralf T. Krampe

  Article: Posture and cognition interfere in later adulthood even without concurrent response production.

  Caroline Smolders, Mihalis Doumas, Ralf Th Krampe
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  ABSTRACT: We investigated adult age differences in dual-task costs in cognitive-sensorimotor settings without concurrent response production and with individually adjusted resource demands for the cognitive task. Twenty-four young adults (M=25.42 years, SD=3.55) and 23 older adults (M=68 years, SD=4.46) performed a cognitive task and two postural control tasks (standing on a stable and moving platform) both separately (single-task context) and concurrently (dual-task context). The cognitive task did not require response production during posture data collection and its difficulty was individually adjusted to 80% correct performance under single-task conditions. Results showed pronounced age differences in postural control in the moving platform condition, which increased further under dual-task conditions. Our findings support the assumption of increased cognitive resource demands for postural control in older adults. They extend existing work by taking two shortcomings of previous studies into account. We discuss cognitive and posture task constraints in this and previous studies as factors determining multi-tasking and its changes in later adulthood.
  Human movement science 09/2009; 29(5):809-19. · 2.15 Impact Factor
• Article: The costs of taking it slowly : Fast and slow movement timing in older age

  Ralf Thomas Krampe, Mihalis Doumas, Ann Lavrysen, Michael Rapp
  Psychology and Aging, v.25, 980-990 (2010).