ISRI - Information Systems Research Indicators

Construct: Perceived Network Externalities

Description
Indicators

Note 1: Following are presented the definitions found for the construct in the used references, together with the theory/model.
Note 2: The same construct can be present in more than one theory/model.
Note 3: If the construct was not proposed in the original theory/model, it is identified as "Additional to theory/model".

Definition: Refer to the phenomenon where the value of joining a network increases with the number of members in the network.

Theory/model: Additional to TAM
Reference: (Y. B. Lu, Deng, & Wang, 2010)

Note 1: This list contains all the indicators (measuring variables) as defined by the authors when proposing/using/applying a theory/model in a context. It also includes the scales used to measure the variables.
Note 2: Some of the indicators are context-dependent.
Note 3: The same construct can be present in more than one theory/model.

Indicator	Scale	Context	Theory/Model	Reference(s)
From my observations, the number of SMS users is large.	Likert 1-7, Strongly Disagree to Agree	Short Message Service (SMS)	TAM	(Y. B. Lu, Deng, & Wang, 2010)

Many of my friends and relatives frequently use SMS.	Likert 1-7, Strongly Disagree to Agree	Short Message Service (SMS)	TAM	(Y. B. Lu, Deng, & Wang, 2010)

I have many opportunities to use SMS.	Likert 1-7, Strongly Disagree to Agree	Short Message Service (SMS)	TAM	(Y. B. Lu, Deng, & Wang, 2010)

In my opinion, many mobile phone users frequently use SMS.	Likert 1-7, Strongly Disagree to Agree	Short Message Service (SMS)	TAM	(Y. B. Lu, Deng, & Wang, 2010)

There are various types of SMS.	Likert 1-7, Strongly Disagree to Agree	Short Message Service (SMS)	TAM	(Y. B. Lu, Deng, & Wang, 2010)

In my opinion, as a communication tool, SMS is as common as other ways of communication (e.g., face-to-face and phone conversation).	Likert 1-7, Strongly Disagree to Agree	Short Message Service (SMS)	TAM	(Y. B. Lu, Deng, & Wang, 2010)