Meanings of counterbalance order in English

Tryptophan-depleting and placebo mixtures were administered double-blind and in counterbalanced order.

All drugs or vehicle alone were administered in a counterbalanced order at 5-day intervals.

Methods: Two groups (20 binge drinkers and 20 non-binge drinkers) performed two sessions in a counterbalanced order.

On subsequent days and in a random, counterbalanced order, subjects performed a 2-min, kayak ergometer test using either an all-out start or even pacing strategy.