Iconic memory is a type of memory that holds visual information for about half a

Question

Iconic memory is a type of memory that holds visual information for about half a second (0.5 seconds). To demonstrate this type of memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer recall. The number of letters correctly recalled is given in the table.

(a) Complete the F-table. (Round your values for MS and F to two decimal places.)

(b) Compute Tukey's HSD post hoc test and interpret the results. (Assume alpha equal to 0.05. Round your answer to two decimal places.)

Explanation / Answer

Anova: Single Factor SUMMARY Groups Count Sum Average Variance 0 6 54 9 7.2 0.5 6 36 6 5.2 1 6 24 4 3.6 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 76 2 38 7.125 0.006679 3.682320344 Within Groups 80 15 5.33333333 Total 156 17

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