Table 1 Correlations between Questionnaire items (see ‘Methods’ for exact wording of each question) and face identity measures (Glasgow Face Matching Test, GFMT; Cambridge Face Memory Test, CFMT; Before They Were Famous task, BTWF) from Study 1. Uncorrected significant correlations are shown in bold: ^ap < .05, ^bp < .01; ^cSignificant correlations following Benjamini-Hochberg correction; 95% CI shown in brackets

Question 1: Participant’s overall estimate of their ability

.25

[− 0.09, 0.54]

.14

[− 0.21, 0.45]

Question 2: Participant’s estimate of their ability to match unfamiliar faces (cf. GFMT)

−.13

[− 0.44, 0.21]

−.17

[− 0.47, 0.18]

Question 3: Participant’s estimate of their ability to recognise familiar faces (cf. BTWF)

.48 ^bc

[0.17, 0.70]

.42 ^ac

[0.09, 0.66]

Question 4: Participant’s estimate of their ability to remember a photo of an unfamiliar face (cf. CFMT)

.18

[− 0.17, 0.48]

.14

[− 0.21, 0.45]

Question 5: Participant’s estimate of their ability to remember an unfamiliar face and recognise it from a different photo (cf. CFMT)

.24

[− 0.11, 0.53]

.25

[− 0.09, 0.54]

Question 6: Participant’s insight into whether seeing multiple different views of a face will promote the learning of face identity

.16

[− 0.19, 0.47]

.20

[− 0.15, 0.50]