Wotschak, C., & Kliegl, R. (2013). Reading strategy modulates parafoveal-on-foveal effects in sentence reading. Quarterly Journal of Experimental Psychology, 66(3), 548-562.
Task demands and individual differences have been linked reliably to word skipping during reading. Such differences in fixation probability may imply a selection effect for multivariate analyses of eye-movement corpora if selection effects correlate with word properties of skipped words. For example, with fewer fixations on short and highly frequent words the power to detect parafoveal-on-foveal effects is reduced. We demonstrate that increasing the fixation probability on function words with a manipulation of the expected difficulty and frequency of questions reduces an age difference in skipping probability (i.e., old adults become comparable to young adults) and helps to uncover significant parafoveal-on-foveal effects in this group of old adults. We discuss implications for the comparison of results of eye-movement research based on multivariate analysis of corpus data with those from display-contingent manipulations of target words.
DOI: 10.1080/17470218.2011.625094
Note: Parts of the original R scripts date back to September 2009 and did not execute without problems anymore. Therefore, scripts were adapted to current versions of lme4 and ggplot2 packages. LMM parameter estimates differ slightly from those reported in the paper. Differences noticed so far did not change any of the intepretations.
Reinhold Kliegl, March 2013
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| Wotschack.Kliegl.2013_graphics.R | [ ] | [03.1] | 7 Kb | 19/03/2013 00:31 |
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| Wotschack.Kliegl.2011_analyses.R | [ ] | [[02]] | 6 Kb | 21/11/2011 17:04 |
| Wotschack.Kliegl.2011_graphics.R | [ ] | [[03]] | 7 Kb | 21/11/2011 17:04 |
| yng_bd3.rda | [ ] | [[04]] | 3260 Kb | 21/11/2011 17:04 |
| old_bd3.rda | [ ] | [[05]] | 2887 Kb | 21/11/2011 17:05 |
| em_id.rda | [ ] | [[06]] | 28 Kb | 21/11/2011 17:05 |
