Fig 1.
Notes: SD: Evaluation of drink by semantic differential method, SFF: subjective fatigue feelings (“Jikaku-sho shirbe”), NASA-TLX: NASA task load index, FEC: Flow checklist, DJR: Duration judgment ratio.
Table 1.
Mental arithmetic task level.
Table 2.
Factors of subjective fatigue feelings.
Table 3.
Items of flow experience checklist.
Fig 2.
Notes: Bars indicate the standard errors of the mean. † p < 0.1, * p < 0.05; MATH: mental arithmetic task.
Fig 3.
Notes: Bars indicate standard errors of the mean; SDS: sequence digit search task.
Fig 4.
Notes: † p < 0.1, * p < 0.05, ** p < 0.01; SFF: subjective fatigue feelings.
Fig 5.
Notes: † p < 0.1; NASA-TLX: NASA task load index; MD: mental demand; PD: physical demand; TD: temporal demand; OP: own performance; EF: effort; FR: frustration; OA: overall workload; RTLX: mean of subscales; AWWL: adaptive weighted workload; MATH: mental arithmetic task.
Fig 6.
Notes: † p < 0.1; NASA-TLX: NASA task load index; MD: mental demand; PD: physical demand; TD: temporal demand; OP: own performance; EF: effort; FR: frustration; OA: overall workload; RTLX: mean of subscales; AWWL: adaptive weighted workload; SDS: sequence digit search task.
Fig 7.
Comparison of FEC and DJR scores between the sessions and tasks.
Notes: * p < 0.05,** p < 0.01, *** p < 0.001; FEC: flow experience checklist; DJR: duration judgement ratio; MATH: mental arithmetic task; SDS: sequence digit search task.
Table 4.
Number of participants in self-report tasks after the experiment.