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!
availability
Three, nine-point items are used to measure the likelihood that a particular product or brand will be in short supply. The timeframe is not stated in the items themselves but could be easily stated in the instructions.
With four, seven-point Likert-type items, the scale measures a person’s belief that he/she has a lot of time to do what is needed. If all of the items are reverse-scored, the scale could be viewed as a measure of time pressure.
The scale uses five, seven-point items to measure how much a person feels at a particular moment that he/she is unrushed and that time is in abundance.
The scale measures a consumer's perceived likelihood that a certain product will not be available when he/she wants it. Four, six-point Likert-type items are used to measure the construct.
The ease with which a consumer is able to find where to purchase so-called "green products" is measured using five, seven-point Likert-type items.
The extent to which a consumer believes that a particular product or brand is in short supply due to unintentional order problems or greater demand than expected is measured using a three-item, seven-point Likert-type scale.
The scale measures the extent to which a consumer believes the availability of an advertised product is limited (quantity or time) and is motivated to purchase one before others do. Three, seven-point Likert-type items compose the scale. Aggarwal, Jun, and Huh (2011) referred to the measure as consumer competition.
The scale is composed of three, seven-point items that measure the importance a shopper places on the breadth of a web store's offerings and that it has the newest products and known brands.
Three, seven-point Likert-type items are used in this scale to measure the degree to which a person believes that a certain website is up and running all of the time without technical problems.
The motivation a shopper felt to buy a product immediately because of its scarcity is measured in this scale with three, seven-point items.
