The primary aim of this randomised, double-blind, placebo-controlled, cross-over study is to assess the short-term cognitive effects of two beverages containing 100 and 300 mg coffeeberry extract (obtained from the fruit of the coffee plant (Coffea arabica) compared to a placebo beverage. The trial will utilise the COMPASS cognitive assessment system and cognitive demand battery (CDB) and mood visual analogue scales (VAS) with assessments taking place at baseline, 60- and 120-minutes post treatment, on four separate testing days separated by 7 days. A treatment containing 75 mg caffeine will be used as a positive control to document participants' responsiveness to an established psychostimulant.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
QUADRUPLE
Enrollment
72
10 oz (296 ml) cherry flavored still beverage
10 oz (296 ml) cherry flavored still beverage
10 oz (296 ml) cherry flavored still beverage
Brain, Performance and Nutrition Research Centre Northumbria University
Newcastle upon Tyne, United Kingdom
Mental fatigue Visual Analog Scale (VAS) score
0-100 mm subjective rating scale, not at all to extremely, within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 120 min post-coffeeberry beverage (100 and 300 mg) consumption during a Cognitive Demand Battery (CDB), compared to placebo beverages. Less mental fatigue is better.
Mental alertness Visual Analog Scale (VAS) score
0-100 mm subjective rating scale, not at all to extremely, within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 120 min post-coffeeberry beverage (100 and 300 mg) consumption during a Cognitive Demand Battery (CDB), compared to placebo beverages. More mental alertness is better.
Mental fatigue Visual Analog Scale (VAS) score
0-100 mm subjective rating scale, not at all to extremely, within Computerised Mental Performance Assessment framework tasks (COMPASS). Less mental fatigue is better.
Time frame: Change from baseline to 60 min post-coffeeberry beverage (100 and 300 mg) consumption, during a Cognitive Demand Battery (CDB), compared to placebo and caffeine beverages
Mental Alertness Visual Analog Scale (VAS) score
0-100 mm subjective rating scale, not at all to extremely, from within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 min post-coffeeberry beverage (100 and 300 mg) consumption, during a Cognitive Demand Battery (CDB), compared to placebo and caffeine beverages. More mental alertness is better.
Motivation Visual Analog Scale (VAS) score
0-100 mm subjective rating scale from none to strongest feelings, within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 and 120 min post-coffeeberry beverage (100 and 300 mg) consumption, during a Cognitive Demand Battery (CDB), compared to placebo and caffeine beverages. More motivation is better.
Fatigue (Mental State Energy and Fatigue Scales, (EFS)) score
Subjective feelings of mental energy and mental fatigue. Intensity rating scale from none to strongest, yields composite score ranging from 0-300, included within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 and 120 min post-coffeeberry beverage (100 and 300 mg) consumption, following CBD, compared to placebo and caffeine beverages. Less fatigue is better.
Fatigue (Physical State Energy and Fatigue Scales, (EFS)) score
Subjective feelings of physical energy and physical fatigue. Intensity rating scale from none to strongest, yields composite score ranging from 0-300, included within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 and 120 min post-coffeeberry beverage (100 and 300 mg) consumption, following CBD, compared to placebo and caffeine beverages. Less fatigue is better.
Alertness (Bond Lader Visual Analog Scale (VAS)) score
0-100 mm subjective rating scale of intensity of feelings within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 and 120 min post-coffeeberry beverage (100 and 300 mg) consumption, following CBD, compared to placebo and caffeine beverages. More alertness is better.
Calmness (Bond Lader Visual Analog Scale (VAS)) score
0-100 mm subjective rating scale of intensity of feelings within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 and 120 min post-coffeeberry beverage (100 and 300 mg) consumption, following CBD, compared to placebo and caffeine beverages. More calmness is better.
Contentedness (Bond Lader Visual Analog Scale (VAS)) score
0-100 mm subjective rating scale of intensity of feelings within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 and 120 min post-coffeeberry beverage (100 and 300 mg) consumption, following CBD, compared to placebo and caffeine beverages. More contentedness is better.
Change in cognitive function measures (Serial subtraction tasks, rapid visual information processing) scores
Objective tests within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Change from baseline to 60 and 120 min post-coffeeberry beverage (100 and 300 mg) consumption, compared to placebo and caffeine beverages. Higher scores are better.
Episodic memory tasks (delayed word recall, delayed word recognition, delayed picture recognition) score
Objective tests within Computerised Mental Performance Assessment framework tasks (COMPASS)
Time frame: Comparison of recollection between coffeeberry beverage (100 and 300 mg), placebo and caffeine beverages to stimuli presented at baseline versus 120 min post-consumption. More recall is better.
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