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Because of the development of optical scanners and cable television, marketing researchers can now test the effectiveness of advertising more precisely.Volunteers in a minimum of six cities are offered food discounts in return for allowing marketing research firms to monitor grocery purchases and send trial commercials to their homes through cable television.
The research subjects shop only at stores equipped with UPC scanners, and their purchases are identified by a special card.Respondents are also told that some of the commercials they see on cable television may differ from those seen by their neighbours.Buying patterns are then compared.For example, Pilgrim Cereals tested a Crunchy Wheat promotion using this system.Half of the 5000 participating homes in one city saw a commercial announcing the promotion; the other half saw a commercial that did not mention the promotion.Pilgrim used scanner data to evaluate the promotion's success before offering the commercials nationwide.
-The 5000 households that allowed their group purchases to be scanned are a:

Definitions:

Tibialis Anterior

A muscle located in the front part of the lower leg, responsible for dorsiflexion and inversion of the foot.

Inverts

Informal term for invertebrates, which are animals that do not have a backbone or spinal column.

Longest Muscle

The Sartorius muscle, extending from the hip to the knee, recognized as the longest muscle in the human body.

Sartorius

The longest muscle in the human body, running from the hip to the knee, and aiding in flexing, abduction, and lateral rotation of the thigh.