The_Observer_product_presentation

The_Observer_product_presentation - Measuring behavior What...

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Measuring behavior What is behavior? • Activities, tasks • Interactions Social Sexual •Gestures • Facial expressions • Vocalizations, speech •Movement •Bodyposture Physiology Why measure behavior? Understand processes • Compare groups, treatments • Statistical testing: Frequencies Durations Latencies Transition matrixes Interaction matrixes Time patterns
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Example: describe what you see
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Measuring behavior A human observer watches the behavior of the subjects and writes down the observations on paper and uses a clock for time-information. Disadvantages: • While writing, no observations •Sub j e c t i v e d a t a • Small recording capacity • Labor intensive analysis And more… the pioneer’s way…
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Solution: an event recorder Create a coding scheme before or during the observations and annotate behavior by a simple key press. This will result in an event-log which contains time-stamped events that can be synchronized with multimodal data: • Videos (one or more) •Phys io log ica ldata • Eye tracking data •Etc. The Observer XT for structured observations
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Behavioral data: example Mother sits reading, child plays while lying on the floor. Child speaks, mother smiles. Child quits playing and sits up. Mother speaks and stands up. One timeline Mother’s behavior Child’s behavior
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Coding with The Observer Record who does what, where, when and how/to whom • Objective, quantitative data • Automatic time recording • Rich data: behavior groups, subjects, modifiers • Minimize the number of codes – fewer errors, faster coding, faster learning • Link with video and other data Calculate frequencies, durations, transitions, time budgets, synchronization, interaction patterns, hierarchies…
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Recording data 1 2 3 4 5
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Visualizing data Synchronized view Behavior Video Physiology Benefits Get a feel for what is going on Cross reference between modalities Visual quality check & correction
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Analyzing data - basic Descriptive statistics Which task was the most error prone?
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This note was uploaded on 03/01/2011 for the course IE 597b at Penn State.

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The_Observer_product_presentation - Measuring behavior What...

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