Performance
• No SRD on gist (both free text and multiple choice)
• SRD on action recognition favoring ff
• ‘Near’ SRD on text object recognition favoring SB/w
audio keywords
• 4:1 to 29:1 compaction rates suitable for tasks
• Psychometric and face validity support for the tasks
(means and variances; relevant to real tasks)
• SRD in gist and visual gist for one video
– Homogeneity of frames diminishes surrogate value
– Keywords help when visual variability decreases