'Memorability and Recollection of Image Details'
Created: 07/20/2018 07:06 AM (PT)
This is an anonymized version of the pre-registration. It was created by the author(s) to use during peer-review.
A non-anonymized version (containing author names) should be made available by the authors when the work it supports is made public.
1) Have any data been collected for this study already?
No, no data have been collected for this study yet.2) What's the main question being asked or hypothesis being tested in this study?
The main question is whether memorability as a property of a whole image is associated with recollection of specific image details. To study this question, in an old/new recognition task, we are going to collect remember/know judgments, eye-tracking data and participants will additionally report with a mouse click the location representing the image detail or location they feel most confident about. We firstly predict that memorable images are also memorable in our task. Additionally, recollection compared to familiarity implies more detailed memories and qualitative retrieval of the study event. Therefore, we expect these introspection-based locations to be more clustered across participants for “remembered” compared to “known” or forgotten images, and for highly memorable compared to non-memorable images. A similar analysis will be conducted for eye-movement data. We expect fixations to be more clustered across participants for “remembered” compared to “known” or forgotten images, and for highly memorable compared to non-memorable images (inter-fixation distance, see Kafkas and Montaldi, 2011). These findings would indicate that memories of memorable images are consistently driven by the same image details. Furthermore, we will analyze the distance between fixation-clusters and introspection-clusters for each image. We expect these inter-cluster distances to be shorter, on average, for correctly recognized compared to forgotten images, for “remembered” compared to “known” images, and for memorable compared to nonmemorable images. This result would indicate that people have introspective, meta-cognitive access to the information on which their mnemonic experience is based.3) Describe the key dependent variable(s) specifying how they will be measured.
DV 1: Old/New Accuracy/Bias DV 2: Remember/Know responses DV 3: Click-Clusters DV 4: Inter-Fixation Distances/Fixation Clusters4) How many and which conditions will participants be assigned to?
Repeated Measures Design with one within-subjects factor with three levels: Memorability (high, medium, low)5) Specify exactly which analyses you will conduct to examine the main question/hypothesis.
Hyp 1: correlation between memorability and hit-rates in our study Hyp 2: t-test for remember versus know responses between highly and low memorable images Hyp 3: cluster analysis of clicks in highly versus low memorable images (exploratory) Hyp 4: t-test on interfixation distances and cluster comparison of fixations/clicks between highly and low memorable images. (exploratory) We specified Hyp. 3 and 4 as exploratory as the analysis pipeline is not 100% set yet.6) Describe exactly how outliers will be defined and handled, and your precise rule(s) for excluding observations.
We will exclude all cases where recognition performance lies at chance levels.
7) How many observations will be collected or what will determine sample size?
No need to justify decision, but be precise about exactly how the number will be determined.
Using G*Power 3 (Faul et al., 2007), we estimated a required sample size of 43 for achieving 95% power and a Cohen’s f of 0.25 for a Repeated Measures Design.
8) Anything else you would like to pre-register?
(e.g., secondary analyses, variables collected for exploratory purposes, unusual analyses planned?)
Next to the clicks, participants will also be asked to draw a circle around the image area that best defines their mnemonic experience. However, we do not know yet how best to analyse such circle areas in accord with our hypotheses, making this part of the experiment exploratory.