- Title
- Measuring single-item identification efficiencies for letters and 3-D objects
- Creator
- Eidels, Ami; Gold, Jason
- Relation
- Behavior Research Methods Vol. 46, Issue 3, p. 722-731
- Publisher Link
- http://dx.doi.org/10.3758/s13428-013-0417-z
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2014
- Description
- Identification thresholds and the corresponding efficiencies (ideal/human thresholds) are typically computed by collapsing data across an entire stimulus set within a given task in order to obtain a "multiple-item" summary measure of information use. However, some individual stimuli may be processed more efficiently than others, and such differences are not captured by conventional multiple-item threshold measurements. Here, we develop and present a technique for measuring "single-item" identification efficiencies. The resulting measure describes the ability of the human observer to make use of the information provided by a single stimulus item within the context of the larger set of stimuli. We applied this technique to the identification of 3-D rendered objects (Exp. 1) and Roman alphabet letters (Exp. 2). Our results showed that efficiency can vary markedly across stimuli within a given task, demonstrating that single-item efficiency measures can reveal important information that is lost by conventional multiple-item efficiency measures.
- Subject
- identification; signal detection; ideal observer; threshold; efficiency
- Identifier
- http://hdl.handle.net/1959.13/1307287
- Identifier
- uon:21385
- Identifier
- ISSN:1554-351X
- Language
- eng
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