When instructions fail, the consequences can go beyond temporary confusion. Research discussed in the American Journal of Pharmaceutical Education highlights how poorly designed instructions can make a design problem feel like a personal failure. Someone who cannot complete a task may assume they are simply bad at it, particularly when the instructions confidently present the process as obvious and provide no useful feedback about what went wrong.
Human-factors research increasingly treats many supposed "user errors" as use errors, meaning that the difficulty can emerge from the interaction between the person and the system. Missing information, ambiguous wording, and unmarked assumptions can therefore create a situation where the user is blamed for a problem the instructions helped create.
That also explains why a confusing instruction can be so much more frustrating than simply having no instructions at all. Without directions, people know they need to figure something out; with bad directions, they can spend time trying to interpret information that was supposed to make the task easier. They may reread the same sentence, inspect a diagram from different angles, try several possible interpretations, or wonder whether they somehow missed an obvious step.
Eventually, the original task becomes secondary to figuring out what the instructions were trying to say. And that is how a two-minute job can turn into a surprisingly complicated investigation, complete with the uncomfortable possibility that the instructions were never as clear as they seemed in the first place.
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Sometimes the hardest part of following instructions is not doing the actual task, but figuring out what the person who wrote them thought was obvious. And once the instructions start creating more questions than answers, it is hard not to wonder whether they were ever tested on an actual human being.
Now, we would love to hear from you. Have you ever followed a set of instructions that somehow left you more confused than when you started? Have you ever had to ignore the instructions completely and figure something out yourself? Share with us in the comments!
