Magnitude Estimation and Cross-Modal Matching of Lingual Vibrotactile and Auditory Sensation

1989 ◽  
Vol 32 (3) ◽  
pp. 698-702 ◽  
Author(s):  
Daniel Harris ◽  
Donald Fucci ◽  
Linda Petrosino
Keyword(s):  
Auditory Stimulus ◽  
Magnitude Estimation ◽  
Sensory Processing ◽  
Test Site ◽  
Systematic Investigation ◽  
Thenar Eminence ◽  
Stimulus Range ◽  
Psychophysical Scaling ◽  
Scaling Methods ◽  
Response Biases

The present experiment was a preliminary attempt to use the psychophysical scaling methods of magnitude estimation and cross-modal matching to investigate suprathreshold judgments of lingual vibrotactile and auditory sensation magnitudes for 20 normal young adult subjects. A 250-Hz lingual vibrotactile stimulus and a 1000-Hz binaural auditory stimulus were employed. To obtain judgments for nonoral vibrotactile sensory magnitudes, the thenar eminence of the hand was also employed as a test site for 5 additional subjects. Eight stimulus intensities were presented during all experimental tasks. The results showed that the slopes of the log-log vibrotactile magnitude estimation functions decreased at higher stimulus intensity levels for both test sites. Auditory magnitude estimation functions were relatively constant throughout the stimulus range. Cross-modal matching functions for the two stimuli generally agreed with functions predicted from the magnitude estimation data, except when subjects adjusted vibration on the tongue to match auditory stimulus intensities. The results suggested that the methods of magnitude estimation and cross-modal matching may be useful for studying sensory processing in the speech production system. However, systematic investigation of response biases associated with vibrotactile-auditory psychophysical scaling tasks appears to be a prerequisite.

Effects of Psychophysical Scaling Method, Body Test-Site, and Skin-Contactor Surface Area on Vibrotactile Magnitude Functions

1987 ◽  
Vol 64 (3_suppl) ◽  
pp. 1127-1138 ◽  
Author(s):  
Donald Fucci ◽  
Linda Petrosino ◽  
Daniel Harris ◽  
Elise Mc Math
Keyword(s):  
Surface Area ◽  
Test Site ◽  
Thenar Eminence ◽  
Interactive Effects ◽  
Vibrotactile Stimulation ◽  
Scaling Method ◽  
Anterior Midline ◽  
Contactor Area ◽  
Psychophysical Scaling ◽  
Scaling Methods

This study was designed to focus on possible interactive effects that scaling method, body test-site, and skin-contactor surface area might have on vibrotactile magnitude functions. The psychophysical scaling methods of magnitude estimation and magnitude production were used to apply vibrotactile stimulation to the anterior midline of the tongue and the thenar eminence of the hand through the use of three skin-contactor areas (.128, .320, and 1.30 cm3). Ten subjects, ranging in age from 19 to 21 yr. ( M age = 19.8 yr.) were employed. Data obtained from the 10 subjects suggested that the suprathreshold-scaling method chosen can be a significant determinant of the findings obtained. They further suggested that the tongue and hand may respond differently to suprathreshold vibrotactile stimulation and that the effects of varying skin-contactor area may be different for the two body-sites tested.

Exposure Effects on the Psychophysical Scaling Methods of Magnitude Estimation and Cross-Modal Matching for Vibrotactile Stimulation of the Tongue and Hand

1988 ◽  
Vol 66 (2) ◽  
pp. 479-485 ◽  
Author(s):  
Donald Fucci ◽  
Daniel Harris ◽  
Linda Petrosino ◽  
Elizabeth Randolph-Tyler
Keyword(s):  
Magnitude Estimation ◽  
Thenar Eminence ◽  
Vibrotactile Stimulus ◽  
Matching Task ◽  
Standard Group ◽  
Estimation Task ◽  
Magnitude Scaling ◽  
Psychophysical Scaling ◽  
Scaling Methods ◽  
The Cross

The purpose of the present study was to investigate possible effects of exposure upon psychophysical scaling responses when vibrotactile magnitude estimation and cross-modal matching are conducted within the same experiment. Four groups of 10 subjects each, with an over-all age range of 18–23 yr., were employed. Groups 1 and 2 performed magnitude estimation for lingual vibrotaction and cross-modal matching with the lingual vibrotactile stimulus as the standard. Group 1 received the magnitude-estimation task first and Group 2 received the cross-modal-matching task first. Groups 3 and 4 performed magnitude estimation for vibrotaction applied to the thenar eminence of the hand and cross-modal matching with the vibrotactile stimulus applied to the thenar eminence of the hand as the standard. Group 3 received the magnitude-estimation task first and Group 4 received the cross-modal-matching task first. The psychophysical scaling methods of magnitude estimation and cross-modal matching showed very little exposure effect of one upon the other when used in the same experiment. Also, magnitude scaling responses tended to increase more rapidly with increases in vibrotactile stimulus intensity when the test site was the thenar eminence of the hand as opposed to the dorsum of the tongue.

Auditory Psychophysical Scaling Exposure Effects: Magnitude Estimation and Cross-Modal Matching

1988 ◽  
Vol 66 (2) ◽  
pp. 643-648 ◽  
Author(s):  
Donald Fucci ◽  
Daniel Harris ◽  
Linda Petrosino ◽  
Elizabeth Randolph-Tyler
Keyword(s):  
Magnitude Estimation ◽  
Dorsal Surface ◽  
Thenar Eminence ◽  
Vibrotactile Stimulus ◽  
Matching Task ◽  
Estimation Task ◽  
Psychophysical Scaling ◽  
The Cross ◽  
The Right ◽  
Age Range

The purpose of the present study was to investigate possible effects of exposure upon suprathreshold psychological responses when auditory magnitude estimation and cross-modal matching with audition as the standard are conducted within the same experiment. Four groups of 10 subjects each whose over-all age range was 18 to 23 yr. were employed. During the cross-modal marching task the Groups 1 and 2 subjects adjusted a vibrotactile stimulus presented to the dorsal surface of the tongue and the Groups 3 and 4 subjects adjusted a vibrotactile stimulus presented to the thenar eminence of the right hand to match binaurally presented auditory stimuli. The magnitude-estimation task was conducted before the cross-modal matching task for Groups 1 and 3 and the cross-modal matching task was conducted before the magnitude-estimation task for Groups 2 and 4. The psychophysical methods of magnitude estimation and cross-modal matching showed no effect of one upon the other when used in the same experiment.

Effects of Exposure to Psychophysical Scaling on Lingual Vibrotactile Magnitude Estimation and Magnitude Production

1986 ◽  
Vol 63 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Donald Fucci ◽  
Daniel Harris ◽  
Elise Mc Math ◽  
Linda Petrosino
Keyword(s):  
Magnitude Estimation ◽  
Prior Exposure ◽  
Magnitude Production ◽  
Production Values ◽  
Psychophysical Scaling ◽  
Significant Difference ◽  
Scaling Methods ◽  
Production Group ◽  
Group 2 ◽  
Group 1

The purpose of the present study was to determine if the results obtained by the scaling methods of magnitude estimation and magnitude production could be influenced by providing subjects with prior exposure to psychophysical scaling in the form of magnitude estimation or magnitude production. Group 1 ( n = 10, Mage = 21.1 yr.) performed lingual vibrotactile-magnitude estimation followed by lingual vibrotactile magnitude production. Group 2 ( n = 10, Mage = 19.7 yr.) performed lingual vibrotactile-magnitude production (using the magnitude-estimation responses provided by Group 1), followed by lingual vibrotactile-magnitude estimation. For the magnitude estimations there was no over-all statistically significant difference between the two groups, but there was for the magnitude-production values. Magnitude-estimation scaling was apparently not influenced by prior exposure to magnitude production, while magnitude-production scaling was influenced by prior exposure to magnitude estimation. The results are discussed in terms of how subjective scaling behavior in psychophysical experimentation may be influenced by the interaction between an absolute internal scaling mechanism and parameters set by the experimenter, such as scaling method and range of stimulus intensity.

A Comparison of Equal-Appearing Interval Scaling and Direct Magnitude Estimation of Nasal Voice Quality

2000 ◽  
Vol 43 (4) ◽  
pp. 979-988 ◽  
Author(s):  
Richard I. Zraick ◽  
Julie M. Liss
Keyword(s):  
Magnitude Estimation ◽  
Voice Quality ◽  
Future Research ◽  
Curvilinear Relationship ◽  
Validity And Reliability ◽  
Methodological Issues ◽  
Psychophysical Scaling ◽  
Scaling Methods

Listeners rated the nasality of synthesized vowels using two psychophysical scaling methods (equal-appearing interval scaling and direct magnitude estimation). A curvilinear relationship between equal-appearing interval ratings and direct magnitude estimations of nasality indicated that nasality is a prothetic rather than metathetic dimension. It also was shown that the use of direct magnitude estimation results in nasality ratings that are more consistent and reliable. The results of this experiment are discussed in relation to other studies that have examined the validity and reliability of equal-appearing interval scaling of voice quality. Additionally, there is a discussion of methodological issues for future research and the implications of the findings for clinical and research purposes.

Spatial Frequency Modulates the Degree of Illusory Second Flash Perception

2015 ◽  
Vol 28 (1-2) ◽  
pp. 1-10 ◽  
Author(s):  
Yasuhiro Takeshima ◽  
Jiro Gyoba
Keyword(s):  
Spatial Frequency ◽  
Sensory Processing ◽  
Processing Speed ◽  
High Spatial Frequency ◽  
Response Latencies ◽  
Temporal Properties ◽  
Spatial Frequencies ◽  
Single Flash ◽  
Response Biases ◽  
Slow Onset

When a brief single flash is presented simultaneously with two brief beeps, the number of presented flashes is often perceived as two. This phenomenon is referred to as the fission illusion. Several effects related to the fission illusion have been investigated using both psychophysical and neurophysiological methods. The present study examined the effects of spatial frequency on the fission illusion. At a low spatial frequency, transient channels respond preferably; conversely, sustained channels respond preferably at a high spatial frequency. Sustained channels differ in temporal properties from transient channels and are characterized by poor temporal resolution and slow-onset responses. In our previous study, visual stimuli presented at a slow processing speed were not conducive to the fission illusion. Therefore, we hypothesized that the fission illusion would not be difficult to observe when using high spatial frequencies. The results indicated that the degree of the perceived illusory second flash was reduced when spatial frequency was high as compared to when it was is low. Furthermore, according to signal detection theory, this difference between high and low spatial frequencies was not attributed to participants’ response biases. Therefore, the fission illusion likely will not occur in conditions of slow processing speed and long response latencies in sustained channels, which respond preferably to high spatial frequency stimuli. Overall, the results indicated that the fission illusion was affected by temporal characteristics of lower-order sensory processing stages.

Using Psychophysics to Design Speech Warnings

2000 ◽  
Vol 44 (22) ◽  
pp. 698-701
Author(s):  
E. Hellier ◽  
B. Weedon ◽  
J. Edworthy ◽  
K. Walters
Keyword(s):  
Power Function ◽  
Magnitude Estimation ◽  
Power Law ◽  
Warning Signal ◽  
Acoustic Parameter ◽  
Psychophysical Scaling ◽  
The Relationship ◽  
Power Function Exponent

An experiment is reported which applies psychophysical scaling techniques to the design of speech warnings. Participants used magnitude estimation to rate the perceived urgency of computer generated warning signal words (Deadly, Danger, Warning, Caution, Note) that varied systematically in speed. Stevens (1957) Power Law was used to model the relationship between changes in the acoustic parameter and changes in the perceived urgency of a particular signal word. The value for warning designers of the power function exponent, which quantifies and predicts the effect of acoustic changes on perceived urgency, is discussed.

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