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Statistical results

Scanning speed:

Truncation x Span (TxS)Main effects (means)

Results on Selection time

Full range delimiters slowest

Truncation has no effect on time

Narrow span menus are slowest

Novices are slower

speed

4

6

wide

narrow

not truncated

truncated

FullLowerUpper

Full----1.15*1.31*

Lower----0.16

Upper----

Span:  Wide4.35

 Narrow5.54

Experience  Novice5.44

 Expert4.36

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