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I really appreciate your marketing scales database online. It is an important resource for both our students and our researchers as well. Since my copies of the original books are slowly disintegrating due to the intensive use, I am happy that you are making them available in this way. It is very helpful in the search for viable constructs on which to do sound scientific research.
Dr. Ingmar Leijen
Vrije Universiteit University, Amsterdam

efficacy

Five items with a 100 point response scale measure the strength of a person’s belief that his/her donation to a particular charity will help recipients, with an emphasis on improving their social status.

A person's self-confidence in his/her ability to open e-mail messages if so desired is measured using five items. 

The scale uses four, five-point Likert-type items to measure a person's belief in the capabilities of another person to respond effectively to one's own participation in a relationship.  Although the statements are not specific to any particular activity or context, instructions could be used with the scale to make it more focused. 

One's attitude regarding the ability of an individual to have an effect on the environment, particularly in the form of reducing pollution, is measured in this scale with three, seven-point Likert-type items.

The scale uses five items to measure a person's self-confidence in his/her ability to forward e-mail messages to others if the content is considered to have value for them. 

One's belief that he/she understands recycling and is capable of doing it is measured in this scale with three statements.  Although not explicit in the statements themselves, the context they refer to is the type of recycling in which the individual must play an active role such as in the home.

The scale uses four, seven-point Likert-type items to measure the degree to which a person believes there is a low probability of getting a particular disease but, if getting it, having the ability to survive it.

The scale measures how strongly a person believes that a particular good or service is able to reveal if a person has a certain life-threatening ailment.  Three, five-point items compose the scale.

The perceived level of proficiency and resourcefulness of some object is measured in this scale using seven-point items.  A three, a four, and a five-item version of the scale are discussed.

The extent to which a person feels that he/she is in control of some object or process is measured in this scale with four, seven-point Likert-type items.  Collier and Sherrell (2010) used the scale with a self-service technology (SST) but it appears to be amenable for use in a wider context.