Research routinely shows that people who’re aware of communication from brand X are more likely to buy that brand. Sometimes used as evidence that communication drives sales, in fact causality usually runs the other way: buying brand X makes you more likely to notice its communications. This phenomenon (the so-called ‘Rosser Reeves effecลฅ โ named after the famous 1950s adman) has been known for decades, yet is still routinely used to ‘prove’ communication effectiveness (most recently to justify social media use).
Excerpt from:ย How not to Plan: 66 ways to screw it up by Les Binet and Sarah Carter