Table 2.

Number of dogs in each age group that succeeded and failed each stage

Age group	Successful	Unsuccessful	Total
Learning task
<8 years	17	5	22
≥8 years	16	6	22
Total	33	11	44
Retention test
<8 years	15	2	17
≥8 years	12	4	16
Total	27	6	33
Reversal task
<8 years	14	1	15
≥8 years	6	6	12
Total	20	7	27