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A Moderating Role of Channel Responsiveness in the Effects of Online Information Source
Unformatted Document Text:  15 family’s allergies (defined as father, mother, and siblings), and in more than 70% of the cases, participants chose “Don’t know” for more distant relatives or friends. Therefore, to create an index of family history, responses on only immediate family members were combined. Salience of the issue allergies. This variable was measured using three questions on a seven-point Likert-type scale, ranging from “Never” to “All the time,” which originated from Rimal and Kim’s (2002) scale (see Appendix 1). Responses were averaged into an index ( =.93). Since this variable (M = 2.97, SD = 1.53) was positively skewed (skewness = .64), it underwent a fourth root transformation to ascertain a normal distribution. (Prior) Attitude toward the issue allergies. Participants were asked to express their degree of agreement to three statements adapted from Rimal and Kim’s (2002) scale (see Appendix 1). Checks for internal consistency indicated the first item reduced the overall reliability, and hence it was dropped from subsequent analyses. Responses to the two remaining items were averaged into an index (r =.43). (Prior) Allergy preventive behaviors. Participants were asked to indicated “Yes,” “No,” “Don’t know,” or “Not applicable” to ten allergy preventive behaviors (see Appendix 1). Responses were coded dichotomously (“Yes” as one and other responses as zero). Of the ten items, “I wear a face mask while cleaning the house” and “When pollen count is high, I wear a face mask to work outdoor” were dropped because none of participants answered “Yes” (M = 0, SD = 0 for both items). The remaining items were averaged into an index ( =.64). Demographic variables. Two demographic variables, sex and age, were used as controls. While sex was measured using a dichotomous measure (e.g., male or female), age was measured by asking the year participants were born. The birth year was then subtracted from the current year to obtain the age. Dependent Variables Attitude toward the source. This variable was measured with three items on a seven- point semantic differential scale, modified from McCroskey and Teven’s (1999) scale: “Likable/Not likable,” “Friendly/Unfriendly,” and “Unpleasant/Pleasant.” The first two items

Authors: Kim, Hyojin. and Stephens, Keri.
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family’s allergies (defined as father, mother, and siblings), and in more than 70% of the cases,
participants chose “Don’t know” for more distant relatives or friends. Therefore, to create an
index of family history, responses on only immediate family members were combined.
Salience of the issue allergies. This variable was measured using three questions on a
seven-point Likert-type scale, ranging from “Never” to “All the time,” which originated from
Rimal and Kim’s (2002) scale (see Appendix 1). Responses were averaged into an index (
=.93). Since this variable (M = 2.97, SD = 1.53) was positively skewed (skewness = .64), it
underwent a fourth root transformation to ascertain a normal distribution.
(Prior) Attitude toward the issue allergies. Participants were asked to express their
degree of agreement to three statements adapted from Rimal and Kim’s (2002) scale (see
Appendix 1). Checks for internal consistency indicated the first item reduced the overall
reliability, and hence it was dropped from subsequent analyses. Responses to the two remaining
items were averaged into an index (r =.43).
(Prior) Allergy preventive behaviors. Participants were asked to indicated “Yes,” “No,”
“Don’t know,” or “Not applicable” to ten allergy preventive behaviors (see Appendix 1).
Responses were coded dichotomously (“Yes” as one and other responses as zero). Of the ten
items, “I wear a face mask while cleaning the house” and “When pollen count is high, I wear a
face mask to work outdoor” were dropped because none of participants answered “Yes” (M = 0,
SD = 0 for both items). The remaining items were averaged into an index ( =.64).
Demographic variables. Two demographic variables, sex and age, were used as controls.
While sex was measured using a dichotomous measure (e.g., male or female), age was measured
by asking the year participants were born. The birth year was then subtracted from the current
year to obtain the age.
Dependent Variables
Attitude toward the source. This variable was measured with three items on a seven-
point semantic differential scale, modified from McCroskey and Teven’s (1999) scale:
“Likable/Not likable,” “Friendly/Unfriendly,” and “Unpleasant/Pleasant.” The first two items


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