Filters in NIPO Conjoint Measurement

NIPO ODIN Version 5.17

Filters in NIPO Conjoint Measurement

The profile on the one side of the screen is referred to as ?A, the profile on the other side of the screen is referred to a ?B.

The filter within NIPO Conjoint Measurement is in principal excluding, which means it prevents the appearance of two levels at the same time on the screen. If used as including, if two levels always have to appear on screen together, both ‘sides’ have to be defined (see below).

Note that he parameters ?A and ?B do not refer to left or right side of the screen! Usually in negative filters the ?B is only used when you do not wish to compare two levels of the same feature (for instance when two brand names are actually the same brand (for example Philips versus Whirlpool) or product (e.g. Opel Agila and Suzuki Wagon R+ are the same car produced under a different name). See also example 3.

Example 1

*IF [ # (?A1,1 & ?A2,2) ]

Level 1 of feature 1 should not appear together with level 2 of feature 2 within one profile.

Example 2

*IF [ # (?A"BRAND",1 & ?A"PRICE",1,2,3) ]

Level 1 of feature BRAND should not appear together with level 1, 2 or 3 of feature PRICE within one profile.

Example 3

*IF [ # (?A"BRAND",1 & ?B"BRAND",2) ]

Level 1 of feature BRAND should not appear opposite to level 2 of feature BRAND in opposite profiles.

Example 4

*IF [ ?A1,1 & ?A2,2 ]

Level 1 of feature 1 should always appear together with level 2 of feature 2. This filter is incomplete, as it might appear on the other side of the screen!

Example 5

*IF [ (?A"BRAND",1 & ?A"PRICE",1,2,3) \ (?B"BRAND",1 & ?B"PRICE",1,2,3)]

Level 1 of feature BRAND should always appear together with level 1, 2 or 3 of feature PRICE. This counts for both sides of the screen.