Why checking feeds doubt

Checking and doubt

Everyone checks things sometimes: that the door is locked, that an email went to the right person. For some people, checking starts to take over. You go back to the door three, four, ten times. You reread a message until you feel sure. You go over a conversation in your head in case you said something wrong.

Checking seems as if it should settle the doubt. Often it does, for a moment, and then the doubt comes back, sometimes stronger. This sheet explains why that happens and what can help.

Reading this does not mean you have OCD. Only a qualified professional can assess that, together with you.

Why checking feels so needed

The urge to check tends to be strongest when three things come together:

You feel it would be your responsibility, or your fault, if something bad happened.

The bad thing feels likely, more likely than it would seem to someone else.

The bad thing feels serious: a fire, a burglary, someone getting hurt.

When all three feel high, checking can seem like the only responsible choice. This is not a sign that you are careless. Many people who check a lot care very much about keeping others safe.

What checking does to memory

Researchers have asked volunteers to check the same thing over and over, for example switching a cooker on and off and checking it, many times in a row. Afterwards, their memory of the last check was about as accurate as before. But it felt less clear, less vivid and less detailed, and they trusted it less. This happened to ordinary volunteers, so it is not a sign that something is wrong with your memory.

Researchers think one reason is that when something becomes very familiar, your mind takes in less fresh detail. Each check looks like the others, so they can blur together, and it gets harder to pick out "the time I just checked". So you feel unsure.

That sets up a loop: you check because you doubt your memory, the checking makes your memory feel hazier, and the haziness brings more doubt and more checking.

Waiting for it to feel right

Many people keep checking until it feels right, or until they feel completely certain. The trouble is that this feeling is not a reliable signal. It may not come at all, or it comes and then fades as soon as you walk away.

Because there is no clear point at which the danger is over, checking has no natural end. That is why one check can turn into many, and why stopping can feel so hard.

How checking spreads

Checking does not only happen with your hands and eyes. It can move into your head, into conversations and onto your phone. Going over a memory again and again, asking someone "Are you sure I locked it?", searching online, taking a photo of the switch, or asking someone else to lock up so it is not on you: these all work the same way. Each one brings a little relief now and a little more doubt later.

Your therapist can share a sheet on the wider OCD cycle, if you have not seen it already.

Checks I notice

Tick any that you notice yourself doing. There are no right or wrong answers, and you do not need to tick many.

What helps

The way out is not to find the perfect check. It is to learn, by doing, that you can live with the doubt without settling it. With your therapist, this usually means exposure and response prevention, or ERP: you plan to do things that set off the urge, then check once, the way most people would, or not at all, or put the check off for a while. You let the doubt stay. Over time, many people find that the urge weakens and the doubt matters less, even though it never becomes certain.

Your therapist may also help you look at how much responsibility you are carrying, and whether some of it belongs to other people or to chance. You plan each step together, at a pace that is hard but manageable.

Over to you