The questionnaires which provided responses for more than 80% of the items in the study were included in the analysis.
The minimum age for study participation was fixed at age 8 years so as to ensure appropriate responses for each of the items in the study questionnaire could be generated.
In constructing the scale, we excluded the indicators "mango farm", "Corn mill machine/tractor" and "Factory" due to extremely low ownership of these items in the study population (both rural/urban and in regions).
Deteriorating rate is another key factor in the study of deteriorating items inventory, which describes the deterioration nature of the items.
Chimpanzees were given a preference test for the food items involved in the study, consisting of a series of 10 forced-choice trials [27].
The number of items in each dimension ranged from 3 to 10 items and was in line with the study of Hair et al. (2013) which indicated that each dimension should have at least 3 items [ 27].
We also provided measures of standardization that are not freely available for all of the Japanese items in the present study (age of acquisition and concreteness) and bilingual norming data for English word familiarity.
All domains were positively correlated among each other and the exact correlation coefficients are shown in Table 4.> -wrap-foot>>> -wraBothot> aBoth IDV (higher correlation with its respective domain) and IIC (correlation of more than 0.4) are achieved * P < 0.0001 All the 22 items measured in the study revealed that correlation of each item with its respective domain is higher than 0.40.
For example, if scrub jays are prevented from recovering their caches for long enough, they will recover only nonperishable items (peanuts, in the study), ignoring their caches of otherwise preferred but perishable food (mealworms, in the study) (Clayton et al. 2003).
