Suggested searches

Looking for a free online survey tool?

Conjoint.ly offers a general survey tool with standard question types, randomisation blocks and multilingual support. Always free.

Get started for free
Request consultation

Do you need support in running a pricing or product study? We can help you with agile consumer research and conjoint analysis.

Request consultation

Dual Negative-Positive Scale

Dual negative-positive scale asks respondents to provide answers as either a positive or negative rating on a 1-5 scales. Results are calculated using the formula: Overall Score = Mean of positive questions - Mean of negative questions.
On this page
Share on

Respondents in different countries use survey scales differently. Academics have identified several country-specific peculiarities. Key among them is the degree of β€œacquiescence bias”, i.e., the extent to which respondents are biased to agree with the presented statement. For example, for a very comparable product, audience, and real market performance of a product, in China a Likert scale result may be 4.5 (on a scale of 1 to 5), while in Argentina it will be 3.5.

To make results more comparable across the countries, Conjoint.ly’s Claims Test employs a well-known but underutilised technique: a dual positive-negative scale. Specifically, we ask the question in two ways (each respondent will see only one of these questions). For example:

  • Give it this statement πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘ if it is good value for money.
  • Give it this statement πŸ‘ŽπŸ‘ŽπŸ‘ŽπŸ‘ŽπŸ‘Ž if it is not a good value for money.

When respondents are presented with the positive question, they can rate the claim from πŸ‘ (lowest) if they feel that the claim is not a good value for money to them and πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘ (highest) if they feel that the claim is a good value for money to them. These responses will be recorded as 1 to 5.

Conversely, when respondents are presented with the negative question, they can rate the claim from πŸ‘Ž (lowest) to πŸ‘ŽπŸ‘ŽπŸ‘ŽπŸ‘ŽπŸ‘Ž (highest).

How do we calculate results

To obtain the diagnostic results that you see in the report, we simply use the following formula:

Overall Score = Mean of positive questions - Mean of negative questions


As such, the Overall Score for a dual positive-negative scale could go from -4 to 4, where an Overall Score of 4 could be obtained when the Mean of positive questions is the absolute highest (coded as 5) and the Mean of negative questions is the absolute lowest (coded as 1), vice versa.

However, very few values would be outside the range of -3 to +3. Hence the colour coding stops outside this range:

-4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

The above legend for diagnostics was obtained and refined from our past studies and pilot projects with our FMCG clients and, from our experience, can be applied to most types of consumer or B2B products.


Share on

Published on 30 October 2018.

Read these articles next:

Busting Market Research Automation Misconceptions

Busting Market Research Automation Misconceptions

Research tools 30 June 2020

Market research automation creates time and cost efficiencies but there are misconceptions surrounding its use. We explore the truth behind these myths. View article

Conjoint analysis segmentation

How to Do Segmentation

Target audience Research tools 7 July 2020

Learn how to do segmentation on the Conjoint.ly platform with this visual guide. View article

Writing a Market Research Report

Writing a Market Research Report: 5 Top Tips

Research tools 18 September 2020

Writing a market research report is a tough skill to master. Read our 5 top tips to get you started for writing a successful market research report. View article