Context

Context: Online Services

Note: This list contains all the constructs (and corresponding measuring variables) as defined by the authors when proposing/using/applying the theories/models in the selected context. It also includes the scales used to measure the variables.

• Construct (Theory/Model): Compatibility (IDT)

  Indicator	Scale	Reference(s)
  At the time I subscribed, I felt this online service would fit well with my knowledge base.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would be easy for me to adjust to.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would fit my lifestyle very well.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would fit my daily routine well.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)

• Construct (Theory/Model): Ease of Use (IDT)

  Indicator	Scale	Reference(s)
  At the time I subscribed, I felt this online service would be hard to learn.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would be quite complicated to master.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would be difficult to use.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would have a complex, hard-to-learn system.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)

• Construct (Theory/Model): Network Externality (Use of Complementary Products) (IDT)

  Indicator	Scale	Reference(s)
  At the time I subscribed to this service: I saw other people using books/manuals about this service.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed to this service: I found at least one book or tutorial describing how to use the service, in addition to the original start-up kit.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed to this service: I found books/software about this on-line service that made it easier and quicker to learn the commands.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed to this service: I could rely on books and/or tutorials to reduce the complexity of using the system.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed to this service: I could benefit by books/tutorials that made it easier to learn the commands.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)

• Construct (Theory/Model): Replacement Versus Disenchantment Discontinuance (IDT)

  Indicator	Scale	Reference(s)
  Please CHECK the one scenario that best identifies the MAIN REASON that you ended your subscription: I decided to discontinue this service and to subscribe to another service that was superior, even though I was not particularly dissatisfied with this service; I was dissatisfied with this service and have not yet subscribed to another; was dissatisfied with the service, began to look for others, and found the one I now subscribe to.	Selection	(Parthasarathy & Bhattacherjee, 1998)

• Construct (Theory/Model): Sources of Influence (External Versus Interpersonal) (IDT)

  Indicator	Scale	Reference(s)
  How much did each of the following source influence you to subscribe to [this] service? Please make sure that the total equals 100%: Articles, reviews, advertising, or other activities of the company: [External influence]; Opinions of friends, colleagues, relatives, or others: [Interpersonal influence]; My own personal experience and general computer knowledge: [Other influence].	Percentage	(Parthasarathy & Bhattacherjee, 1998)

• Construct (Theory/Model): Usefulness (IDT)

  Indicator	Scale	Reference(s)
  At the time I subscribed, I felt this online service would save me time/effort over other means of performing the same tasks.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would enable me to perform many tasks better than through other means.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would provide a greater value than other ways of performing the same task.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)
  At the time I subscribed, I felt this online service would be better than other ways of performing the same activities.	Likert 1-7	(Parthasarathy & Bhattacherjee, 1998)

• Construct (Theory/Model): Utilization (IDT)

  Indicator	Scale	Reference(s)
  Typically, how often did you use this service? [Frequency of use] Less than once a month/Once a month/Once a week/2–3 times a week/Most days.	Selection	(Parthasarathy & Bhattacherjee, 1998)
  Typically, how much time did you spend online each time you logged on? [Duration of use] Less than 15 minutes/15–20 minutes/30–60 minutes/1–2 hours/ Over 2 hours;	Selection	(Parthasarathy & Bhattacherjee, 1998)