The Marketing Scales website is a gold mine of information. It is the only source that helps me understand the psychometric quality of the instruments used in past research. I recommend that researchers bookmark this site . . . they will be back!
usefulness
This scale has three, seven-point items that measure the degree to which a consumer believes a particular product appears to be fucntional and useful. (With the proper instructions, this scale can be used to measure which of two products or brands has the highest quality.)
Three items are used to measure the degree to which a person receives information from someone else that is beyond what the person was already aware of. The items in the scale are rather general but may make the most sense when an important decision is about to be made by a person (the participant) and a conversation with someone with greater knowledge or expertise on the topic provides information that changes the participant's attitude.
The scale uses three, seven-point items to measure how much a person believes a review or set of reviews he/she has read are useful and worth relying on with regard to a particular purchase.
With three sentences, the scale measures how useful a particular web page is considered to be.
How much a consumer believes a particular subscription contract would be very beneficial to him/her is measured using four, seven-point Likert-type items.
The ease of understanding and using a branded mobile phone application is measured with three, seven-point Likert-type items.
Three, 100-point items measure the degree to which a person believes that a particular task is not just accomplished well by algorithms, but performs better than humans. The actual task is not stated in the sentences and, whatever it is should be made clear to participants prior to filling out the scale.
Three, ten-point items measure how much a consumer wants more detailed information about something because of the information’s usefulness.
The efficacy and likelihood that a “treatment” will cure a “condition” are measured with five, nine-point questions. The particular treatment and condition are specified in the items.
This Likert scale has three, five-point items that measure how much a technological application helps a customer shopping at an online store be more effective and, in particular, better evaluate a product.
