. 2023 Jun 16;11:e15074. doi: 10.7717/peerj.15074

Table 3. Value of the contrast test for each of the questions between the control (CO) and the experimental (EX) groups related to knowledge assessment.

Questions	N	M_CO ±SD	M_EX ±SD	χ ^2x	P
1. If you can have a chimpanzee at home since being a baby, do you think it could be a good pet?	1,538	0,47 ± 0,50	0,86 ± 0,34	273,037	0.000
2. The chimpanzee is A solitary/social animal/ He lives in groups/on his own	1,531	0,92 ± 0,27	0,97 ± 0,15	19,636	0.000
3. Do you think chimpanzees are good for TV commercials?	1,538	0,80 ± 0,40	0,95 ± 0,20	86,724	0.000
4. Does training animals like chimpanzees to participate in movies or commercials hurt them?	1,533	0,56 ± 0,50	0,75 ± 0,43	56,033	0.000
5. Chimpanzees are endangered/ vulnerable/not threatened	1,529	0,45 ± 0,50	0,70 ± 0,46	99,393	0.000
6. How many years a chimpanzee can live in captivity?	1,518	0,37 ± 0,48	0,87 ± 0,40	296,242	0.000
7. How much can an adult male chimpanzee weigh?	1,527	0,31 ± 0,46	0,25 ± 0,43	8,599	0.003
8. A primate rescue center like the Mona sanctuary: (a) Rescues and socializes primates that come from circuses, TV commercials and the pet trade. (b) Heals the chimpanzees and then takes them back to their habitat. (c) Heals primates injured in the jungle. (d) All of these are correct	1,530	0,31 ± 0,46	0,75 ± 0,43	300,456	0.000

Notes.