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Effects of Brain Laterality on Decoding Accuracy for Facial Displays of Emotion
Unformatted Document Text:  Effects of Brain 17 left-handed or ambidextrous, this constituted a marker of anomalous dominance, whereas having all right-handed first-degree relatives constituted a marker of standard dominance. Finally, scores on Rich’s disorders checklist ranged from 0 to 60 for immune disorders and from 0 to 8 for learning disorders. Scoring higher than 4.78 for immune disorders or 0.31 for learning disorders constituted a marker of anomalous dominance, whereas scoring below these markers but greater than 0 signified mixed dominance, and scoring 0 for both types of disorders signified standard dominance 4 . Respondents were classified as being of standard, mixed, or anomalous dominance based on a preponderance of the evidence. Those who received one marker for each type of dominance were classified as mixed, whereas those receiving two or three markers for standard were classified as standard and those receiving two or three markers for anomalous were classified as anomalous. As Bodary and Miller (2000) noted, this procedure is not the only option for classifying brain laterality, but because it is such a low-inference operational definition it is generally preferred over using psychosocial instruments such as the Herrmann Brain Dominance Instrument (HBDI) or Torrance’s Styles of Learning and Thinking (SOLAT) measure. Decoding ability for facial expressions of emotion was tested using Part I of the Facial Meaning Sensitivity Test (FMST: Leathers & Emigh, 1980). This instrument consists of a series of ten photographs, each depicting a young woman’s facial expression of a particular emotion. Ten emotions are then listed for the participant, and the participant is asked to match the emotion with the picture in which it is depicted. This instrument is sometimes referred to as the Loren Lewis Series, in recognition of the model appearing in the photographs. The ten emotions are: disgust, happiness, interest, sadness, bewilderment, contempt, surprise, anger, determination, and fear. The FMST also includes two other parts that are more complex and

Authors: Floyd, Kory. and Mikkelson, Alan.
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Effects of Brain 17
left-handed or ambidextrous, this constituted a marker of anomalous dominance, whereas having
all right-handed first-degree relatives constituted a marker of standard dominance. Finally,
scores on Rich’s disorders checklist ranged from 0 to 60 for immune disorders and from 0 to 8
for learning disorders. Scoring higher than 4.78 for immune disorders or 0.31 for learning
disorders constituted a marker of anomalous dominance, whereas scoring below these markers
but greater than 0 signified mixed dominance, and scoring 0 for both types of disorders signified
standard dominance
4
. Respondents were classified as being of standard, mixed, or anomalous
dominance based on a preponderance of the evidence. Those who received one marker for each
type of dominance were classified as mixed, whereas those receiving two or three markers for
standard were classified as standard and those receiving two or three markers for anomalous
were classified as anomalous. As Bodary and Miller (2000) noted, this procedure is not the only
option for classifying brain laterality, but because it is such a low-inference operational
definition it is generally preferred over using psychosocial instruments such as the Herrmann
Brain Dominance Instrument (HBDI) or Torrance’s Styles of Learning and Thinking (SOLAT)
measure.
Decoding ability for facial expressions of emotion was tested using Part I of the Facial
Meaning Sensitivity Test (FMST: Leathers & Emigh, 1980). This instrument consists of a
series of ten photographs, each depicting a young woman’s facial expression of a particular
emotion. Ten emotions are then listed for the participant, and the participant is asked to match
the emotion with the picture in which it is depicted. This instrument is sometimes referred to as
the Loren Lewis Series, in recognition of the model appearing in the photographs. The ten
emotions are: disgust, happiness, interest, sadness, bewilderment, contempt, surprise, anger,
determination, and fear. The FMST also includes two other parts that are more complex and


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