Table 1
Mean Performance Measures and Standard Deviations for each condition in Experiment 1
| Moving | Survival | |||
|---|---|---|---|---|
| Measure | M | SD | M | SD |
| Rate of recall (%) | 47.00 | 10.00 | 47.00 | 15.00 |
| Clustering (ARC) | .59 | .22 | .57 | .28 |
| Rating | 3.21 | 0.51 | 2.38 | 0.40 |
| Response time (ms) | 928.50 | 353.70 | 1084.60 | 334.80 |
| Approach to asymptote | .65 | .27 | .54 | .27 |
| Asymptote | 18.43 | 5.22 | 21.44 | 9.76 |
[i] Note: ARC = Adjusted Ratio of Clustering. The rating scale of relevance varied from 1 (irrelevant) to 5 (very relevant).
Figure 1
Mean cumulative-recall for each condition in Experiment 1.
Table 2
Mean Adjusted Ration of Clustering (ARC) (and Standard Deviations) for the Participants with the Lowest and Highest ARC Values, and Corresponding Proportions of Recall for each Condition, in Experiments 1 and 2
| Experiment 1 | Experiment 2 | |||
|---|---|---|---|---|
| Measure | Moving | Survival | Moving | Survival |
| Low ARC | .43(.16) | .38(.27) | .15(.21) | .26(.11) |
| Recall Low ARC (%) | .45(.15) | .41(.14) | .43(.15) | .42(.15) |
| High ARC | .76(.14) | .76(.11) | .55(.14) | .60(.16) |
| Recall (%) | .49(.13) | .53(.13) | .43(.13) | .47(.13) |
[i] Note: ARC = Adjusted Ratio of Clustering.
Table 3
Mean Performance Measures for each condition in Experiment 2
| Moving | Survival | |||
|---|---|---|---|---|
| Measure | M | SD | M | SD |
| Rate of recall (%) | 43.00 | 14.00 | 45.00 | 14.00 |
| Clustering (ARC) | .34 | .27 | .43 | .22 |
| Rating | 3.11 | 0.49 | 2.15 | 0.46 |
| Response time (ms) | 899.18 | 280.00 | 890.56 | 323.80 |
| Approach to asymptote | .79 | .43 | .55 | .30 |
| Asymptote | 17.48 | 7.94 | 19.95 | 8.58 |
[i] Note: ARC = Adjusted Ratio of Clustering. The rating scale of relevance varied from 1 (irrelevant) to 5 (very relevant).
Figure 2
Mean cumulative-recall for each condition in Experiment 2.
| Things women wear | Things people put on walls | Things that make noise | Things that are mainly made of plastic | Things that people keep in their pockets | Things that have smell | Inflammable things | Things that dogs chase |
|---|---|---|---|---|---|---|---|
| tops | painting | television | packages | sweets | soap | spray | rats |
| bikini | hangers | horn | bowls | wallet | shampoo | wood | bicycle |
| shorts | decorations | motorbikes | folders | money | deodorant | firelighters | tail |
| socks | mirrow | music | buckets | documents | flowers | gasoline | owner |
| pijamas | frames | radio | boxes | coins | fruit | firewood | insects |
| bra | nails | bell | bags | banknotes | trash | oil | bones |
[i] Note: This list corresponds to a translation into English of the items presented in European Portuguese in our studies.