Is this wise advice? Probably not. In a seminal study on inattentional blindness, Simons and Chabris (1999) demonstrated how we can sometimes lose focus on important issues when we concentrate fully on other matters. Likewise, in a study based on a real-world incident, Chabris et al (2011) provided supporting evidence of this phenomenon that resulted in a Boston police officer being exonerated of a criminal offence.
In a classroom it can seem like a good idea to focus on the topic, or a particular student or group. In doing so, one runs the risk of not noticing something else of equal or greater importance.
See for yourself:
- Chabris, C.F., Weinberger, A., Fontaine, M., and Simons, D.J. 2011. You do not talk about Fight Club if you do not notice Fight Club: Inattentional blindness for a simulated real-world assault. i-Perception, 2(2), p.150.
- Simons, D.J. and Chabris, C.F., 1999. Gorillas in our midst: Sustained inattentional blindness for dynamic events. Perception-London, 28(9), pp.1059-1074.


