Within subjects design

Camp DM, Robinson TE. 1991. The feasibility of repeated intracerebral microdialysis for within-subjects design e3q>eri-ments on the mesostriatal dopamine system. Curr Sep 10 78. 

The subjective and behavioral effects of triazolam were investigated in 20 healthy women, who took oral triazolam 0.25 mg or placebo at the follicular, periovulatory, and luteal phases of their menstrual cycle in a within-subject design (12). After triazolam most of them reported the expected increases in fatigue and decreases in arousal and psychomotor performance. Neither plasma concentrations of triazolam nor mood and performance differed across the three phases. This study shows that the effects of triazolam are highly stable across the menstrual cycle. 

Earners and Ramaekers (1999) also used professional instructors to rate their drivers performance while they drove through city streets. However, their study was a within-subject design, and thus all drivers received all combinations of drugs, including placebo, alcohol... 

A total of nine people participated in our experiment. Participants consisted of six males and three females with a mean age of 24.3 years all were regular computer users. We employed a within-subjects design, meaning that all nine participants performed all five tasks. The order of presentation was counterbalanced between subjects to eliminate any bias due to ordering. 

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