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Table 1 Percentage of choices to the baited container (pre-test) and the frozen juice (experiments 1 and 2) for each subject. A direct comparison between conditions at the individual level in Experiment 1 is also shown

From: Keeping track of time: evidence for episodic-like memory in great apes

Name Genus Age Pre-test Experiment 1 Experiment 2
    2-min 1-h 2-h 24-h 5-min 1-h χ 2 p 5-min 1-h
Kuno Pan paniscus 11 100 100 100 66.66 72.22 27.78 7.11 0.018 66.66 16.67
Limbuko Pan paniscus 12 100 100 100 66.66 66.66 23.53 6.55 0.018 33.33 50
Alex Pan troglodytes 6 100 66.66 100 100 94.44 88.24 0.43 NS NT NT
Lome Pan troglodytes 6 100 66.66 100 100 58.88 31.25 0.35 NS NT NT
Alexandra Pan troglodytes 8 100 100 33.33 66 88.88 68.75 1.83 NS NT NT
Jahaga Pan troglodytes 14 100 100 100 100 88.88 33.34 11.68 0.002 50 0
Fifi Pan troglodytes 14 100 100 100 66.66 83.33 44.45 5.9 0.035 80 20
Dorien Pan troglodytes 27 100 100 100 100 60 50 0.33 NS NT NT
Fraukje Pan troglodytes 31 100 100 100 33.33 88.88 83.34 0.23 NS NT NT
Padanaa Pongo pygmaeus 10 100 100 100 66.66 100 77.23 0.58 NS 100 50
Dokana Pongo pygmaeus 18 100 100 33.33 100 94.44 88.24 0.43 NS NT NT
Pini Pongo pygmaeus 19 100 100 66.66 100 94.44 100 1.02 NS NT NT
  1. NT not tested
  2. aPadana was presented with Experiment 2 because she chose 4 times in row out of 6 the grape in the 1-h trial in the last round of Experiment 1