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Two choices good, four choices better: For measuring stereoacuity in children, a four-alternative forced-choice paradigm is more efficient than two

Fig 2

Age distributions of participants in both experiments.

The age distribution for the2-AFC task are presented on the left and for the 4-AFC on the right.

Fig 2

doi: https://doi.org/10.1371/journal.pone.0201366.g002