How do students who stutter (and those who don’t) think that
their college professors perceive them? The March 2021 issue of the Journal of
Fluency Disorders contains an article by Danielle Werle and Courtney T. Byrd titled
College professors’ perception of students who stutter and the impact on
comfort approaching professors. They surveyed 246 adult students, half who
stuttered and the other half who did not. Participants were asked to rank how
they believed professors perceived them regarding sixteen traits on a scale
ranging from zero to one hundred. Seven traits are positive: Bold, Bright,
Calm, Competent, Intelligent, Open, Self-Assured. The other nine traits are
negative: Aggressive, Dull, Incompetent, Mediocre, Nervous, Passive, Reticent,
Self-conscious, Shy.
Table 2 of the article listed the ranks for sixteen traits,
as shown above in alphabetical order via a bar chart. For six traits indicated
by asterisks (Incompetent, Nervous, Open, Self-assured, Self-conscious, and
Shy) there were statistically significant differences between stutterers and
non-stutterers. Four of those traits (Incompetent, Nervous, Self-conscious, and
Shy) are negative, and stutterers had
higher rankings than non-stutterers. The other two, Open and Self-assured are
positive and non-stutterers had higher rankings than stutterers.
A second bar chart plots the differences in rank (stutterers
minus non-stutterers). They rank as follows: Nervous* 21.41, Shy* 21.04,
Self-conscious* 20.97, Reticent* 11.48, Incompetent* 10.55, Dull 7.54, Passive
6.07, Mediocre 4.87, Intelligent 1.09, Aggressive 1.06, Bright -1.33, Bold
-4.67, Calm -9.92, Competent -10.6, Open* -13.31, Self-assured* -17.93. For
Competent and Incompetent the absolute value of the difference is almost identical.
The choice of traits for this survey has an obvious flaw.
The analysis did not compare two obvious opposites – Competent and Incompetent.
Examination of the bar chart reveals other sets of opposites (as indicated
above): Aggressive and Passive, Bold and Shy, Bright and Dull or Intelligent , Calm
and Nervous, Competent and Incompetent, and Self-Assured or Self-Conscious. An
obvious way to do this is by flipping the scale over to compare Competent
versus [100 – Incompetent]. A third bar chart shows the six sets of opposite
traits together. There really are just nine independent traits. I found those
sets described in a 2007 article in the Journal of Fluency Disorders (Volume 32,
pages 297 to 309) by Sean P. MacKinnon et al that is titled Origins of the
stuttering stereotype: Stereotype formation through anchoring adjustment. Their
Table 1 has 25 items on semantic differential scales, including aggressive-passive,
shy-bold, intelligent-dull, nervous-calm, and self-conscious – self-assured
(but not competent -incompetent).
What about impact on comfort when approaching professors? All
students were asked a Yes/No question – whether they felt comfortable
approaching their professor to discuss their performance on oral presentations.
(Those who stutter also were asked some other questions). A logistic regression
model for that Yes/No question found only the trait Self-assured had a significant
coefficient for prediction. Their results section mentioned testing from the
statistical problem of multicollinearity (when two related variables both are
competing to predict a result). But that problem instead needed to be discussed
back when the questions were chosen.