Robbie is a strong supporter of a certain new approach to curing cancer. The approach has not been formally tested and has not been approved by any certifying organization in any country. Robbie reads an article in an online blog that is a testimony to all the people who have been healed by this new approach. Based on an article alone, Robbie tells everyone there is clear evidence that the approach works. Robbie's attitude about the approach is likely caused by A : the halo effect. B : perceptual distortion. C : visual distortion. D : selective perception.

B : perceptual distortion

Explanation:

Perceptual Distortion is an unusual response to stimuli, based on abnormal interpretation. Its happens due to cognitive bias, personal preference bias & belief set. Such misinterpretations are biased, they are formed irrespective of authenticity of information in hand.

Its extremely crucial to validate a medical proposition based on only scientific medical research by the specialists. However, Robbie claims - that an approach to cancer cure surely works. She does so not grounded on medical organisation certification to the approach, but based on a blog testimony she read. Such unusually conclusive interpretation made by her is due to her innate support towards the approach. So, it reflects perceptual distortion.