Likely confounds in a within-subjects design are:

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All of these factors are likely confounds in a within-subjects design. 
- Order effects refer to changes in participant's responses due to the order of the conditions in the study. For example, participants may become fatigued or bored after several repetitions of a task or may improve due to practice effects.
- Carryover effects occur when an earlier condition influences participant's responses to a later condition. For example, if a previous task or condition primes participants for certain responses or biases.
- Time-related effects refer to changes in participant's responses that are unrelated to experimental manipulations, but rather due to factors such as circadian rhythms or fatigue over the course of the study.

Likely Confounds in a Within-Subjects Design Are