A quick search on Google will show three things about visualisation:

  • There’s an awful lot of opinion that those who say they can’t visualise actually can,
  • There are a very few people who admit openly that they can’t or have a great deal of difficulty doing so,
  • That there’s practically no obvious research being done looking at the variability of people’s ability to visualise.

So it may be surprising if you can see things in your mind’s eye if someone tells you they can’t, or can only do so in a limited way. It may be more surprising if I told you that in my own case I once could do so, but now can’t. In other words – your ability to visualise can change.

But there is a study on the variability in the “vividness of mental imagery” published openly. It was carried out in 2006 and published in Science Direct in 2007. Link: http://www.hnl.bcm.tmc.edu/articles/ScienceDirect2007.pdf

The study looked at a small group of 8 subjects, 2 females and 6 males, aged 25-31. It looked at three tasks:

  • Subjective vividness rating, in which the subjects described how well they could visualise.
  • A colour naming task, which excluded two additional subjects who scored too low.
  • A visualisation (mental imaging) task while being scanned by an fMRI scanner.

The first task used the vividness of visual imagery questionnaire developed by Marks in 1973. You can find out more on this from this link: http://en.wikipedia.org/wiki/Vividness_of_Visual_Imagery_Questionnaire_(VVIQ).

The colour naming task is explained in the link to the study.

The main part of the study itself looked at whether the subjects’ reported vividness in the VVIQ could be correlated by the fMRI scan. To do this, they were blindfolded and asked to visualise a preset task while scanned. Again, the full details are in the linked document.

The study found a statistically significant correlation between:

  • The objective data from each subject’s visual cortex from the fMRI scan, and
  • The subjective rating of that subject in the VVIQ.

In other words, the person’s own assessment of how well or badly they can visualise is shown in the scan. This confirms that there can indeed be variability in how people can visualise.

Go back to Part 1 | Go on to Part 3