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  • Journal of Vision >
  • Journal of Vision >
    Figure 1 The time course of a typical trial in Experiment 1 .
  • Journal of Vision >
    Figure 2 The distribution of correlation coefficients between (A) normalized absolute errors and (B) normalized signed errors in reporting the mean size and numerosity in Experiment 1 (trial-by-trial analyses of responses in Both task separate for each observer). The blue and red lines represent the values of Pearson's r , after which correlations become significant at 0.05 and 0.002 (*Bonferroni-corrected for 23 comparisons) levels correspondingly (for df = number of paired observations − 2 = 178).
  • Journal of Vision >
    Figure 3 (A) The cross-correlations between reports of different summaries in the same report conditions (baseline, first- and second-order reports in dual task) and (B) the autocorrelations of mean estimation and (C) numerosity estimation under different report conditions (baseline, first- and second-order reports in dual task). The gray regions denote 95% confidence intervals.
  • Journal of Vision >
    Figure 4 Attention operating characteristics for precision (normalized absolute error) in Experiment 1 . Average errors in numerosity estimates are on the x -axis, while those in mean size estimates are on the y -axis. Black horizontal and vertical lines represent the average error in baseline conditions (Mean and Numerosity tasks, respectively). The red data point denotes the Error in the Both task when participants reported the mean size first; the blue data point denotes the Error in the Both task when participants reported numerosity first. Error bars around the data points and gray shaded areas around the baselines denote ±95% confidence intervals.
  • Journal of Vision >
    Figure 5 The time course of a typical trial in Experiment 2A .
  • Journal of Vision >
    Figure 6 The results of Experiment 2A . (A) Trial-by-trial correlation between correct and observer responses. (B) Error as a function of layout and difference in mean size. Error bars (B) and gray region (A) denote ±95% confidence intervals.
  • Journal of Vision >
    Figure 7 The time course of a typical trial in Experiment 2B .
  • Journal of Vision >
    Figure 8 The distribution of correlation coefficients between (A) normalized absolute errors and (B) normalized signed errors in reporting the mean size and numerosity in Experiment 2B (trial-by-trial analyses of responses in the Both task separate for each observer). The blue and red lines represent the values of Pearson's r , after which correlations become significant at 0.05 and 0.002 (Bonferroni-corrected for 23 comparison) levels correspondingly (for df = number of paired observations − 2 = 178).
  • Journal of Vision >
    Figure 9 (A) The cross-correlations between reports of different summaries in the same report conditions (baseline, first- and second-order reports in dual task) and the autocorrelations of (B) mean estimation and (C) range estimation under different report conditions (baseline, first- and second-order reports in dual task). The gray regions denote 95% confidence intervals.
  • Journal of Vision >
    Figure 10 Attention operating characteristics for precision (Error) in Experiment 3. Average errors in range estimates are on the x -axis, average errors in mean size estimates are on the y -axis. Black horizontal and vertical lines represent the average Error in baseline conditions (Mean and Range tasks, respectively). The red data point denotes the Error in the Both task when participants reported the mean size first; the blue data point denotes the Error in the Both task when participants reported range first. Error bars around the data points and gray shaded areas around the baselines denote ±95% confidence intervals.
  • Journal of Vision >
  • Journal of Vision >
    Figure 1. Search for a left tilted item becomes more difficult as distractors become more heterogeneous (A–C) until the distribution of distractors becomes relatively smooth (D), at which point, search becomes easier.
  • Journal of Vision >
    Figure 2. Examples of four segmentability conditions in Experiment 1 for target present trials. Target = red steep line , set size = 17. The lines are slightly enlarged for illustrative purposes. The histograms below show frequency distributions of color values and orientation values among distractors.