Listening Section 4: Note & Table Completion: Question 5

Transcript-based practice (no audio).

Lecturer: Today's topic is habit formation (how a behaviour that once required real conscious effort eventually becomes something we do almost without thinking. Psychologists commonly describe this process using a three-part model called the habit loop. The first part is the cue, a trigger) a time, place, emotional state or preceding action. That signals the brain a particular behaviour is available. The second part is the routine itself, the actual behaviour that follows. And the third part is the reward, some form of positive outcome that reinforces the connection between that cue and that routine, making it more likely to fire again next time the same cue appears.

What's happening in the brain during this process is genuinely interesting. Early on, while a behaviour is still deliberate, it's largely controlled by the prefrontal cortex, the region responsible for conscious planning and decision-making. But as the cue-routine-reward sequence repeats, control gradually shifts to a deeper brain structure called the striatum, part of a group of structures known as the basal ganglia. Once the striatum takes over, the entire sequence of actions effectively compresses into a single automatic unit, a process researchers call chunking, and the behaviour can then run with minimal conscious input.

This has an interesting side effect: once a habit is fully chunked, the cue alone is often enough to trigger the routine, even when the reward that originally reinforced it is no longer relevant or even desired. This explains a common phenomenon known as a habitual slip. For example, someone who has just changed jobs might still automatically turn the car toward their old workplace, because years of driving that route had already fully chunked the behaviour.

So how long does it actually take to build a new habit? There's a widely repeated myth that any new behaviour becomes automatic after twenty-one days, but that figure has no solid research basis. A frequently cited study led by the researcher Phillippa Lally tracked participants forming everyday habits and found the true time ranged enormously, from as little as eighteen days up to two hundred and fifty-four days, with an average of around sixty-six days before a behaviour reached full automaticity.

One practical technique that takes advantage of the habit loop is called habit stacking, where you deliberately attach a new, desired behaviour to the cue of an already well-established habit. For instance, doing a set of stretches immediately after brushing your teeth, since brushing your teeth already happens reliably every single day. Because the existing habit's cue is already firmly wired in, the new behaviour gets to piggyback on a trigger that doesn't need to be built from scratch.

Complete the notes below. Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.

Habit Formation. Lecture Notes

The habit loop

• Trigger: (1) ______________
• Behaviour that follows the trigger: (2) ______________
• Reinforcing outcome: (3) ______________

Brain basis

• Region responsible for early, deliberate control: (4) ______________
• Structure that takes over once a behaviour is automatic: (5) ______________
• Term for compressing a sequence of actions into one automatic unit: (6) ______________

A common problem

• Performing a habit unintentionally in the wrong context: a (7) ______________

Timing research

• Popular but inaccurate myth about habit-formation time: (8) ______________
• Average time found by Lally's research: (9) ______________

A practical technique

• Attaching a new habit to an existing habit's cue: (10) ______________