Cognitive load is the total amount of mental effort a task demands from working memory, combining intrinsic load (how complex the task itself is) and extraneous load (unnecessary distractions or confusing presentation that eat up mental resources without helping you learn).
Cognitive load is how much of your limited working memory a task is using up at any moment. Working memory can only juggle a few pieces of information at once, so every task you do spends some of that small budget. When the demands of a task exceed the budget, information gets dropped, encoding fails, and forgetting happens.
Psychologists split the load into two parts. Intrinsic cognitive load is the difficulty built into the material itself (solving a multi-step physics problem carries more intrinsic load than recalling your phone number). Extraneous cognitive load is everything that burns mental effort without helping, like a cluttered slide, background noise, or a confusing textbook explanation. Think of working memory as a backpack with limited space. Intrinsic load is the gear you actually need; extraneous load is the junk weighing you down. Good studying (and good teaching) is mostly about cutting the junk.
Cognitive load lives in Unit 5's coverage of forgetting and memory distortion, where it explains why memory fails rather than just listing the ways it fails. Overloaded working memory means weak encoding, and weak encoding is the root of a lot of what the [Forgetting and Memory Distortion study guide](topic 5.5) covers, including interference and encoding failure. It also connects directly to the memory strategies AP Psych wants you to know, like the spacing effect and rehearsal, which work precisely because they manage cognitive load instead of fighting it. On the exam, cognitive load shows up as the underlying mechanism in questions about interference, distraction, multitasking, and why cramming fails.
Keep studying AP Psychology Unit 5
Working Memory (Unit 5)
Cognitive load only makes sense because working memory has a tiny capacity, roughly 7 plus or minus 2 chunks. Cognitive load is the demand; working memory capacity is the supply. When demand exceeds supply, information never gets encoded into long-term memory.
Intrinsic and Extraneous Cognitive Load (Unit 5)
These are the two components that add up to total cognitive load. You can't usually lower intrinsic load (the content is as hard as it is), but you can slash extraneous load by removing distractions and bad formatting. That asymmetry is the practical insight the exam likes.
Spacing Effect (Unit 5)
Spacing study sessions out works partly because it keeps cognitive load manageable. Cramming dumps everything into working memory at once and overloads it; distributed practice lets you encode in chunks your working memory can actually handle.
Forgetting Curve (Unit 5)
Ebbinghaus's curve shows how fast unrehearsed information fades. High cognitive load makes the curve worse, because overloaded working memory produces shallow encoding, and shallowly encoded material is the first to disappear.
No released FRQ has used "cognitive load" verbatim, but it's the mechanism behind questions you will definitely see. Multiple-choice stems tend to be application scenarios, like a student trying to learn new vocabulary while watching TV, or a question asking how interference theory relates to cognitive load (a real Fiveable practice question pairs exactly those two). Your job is to identify that working memory has limited capacity, classify whether the burden is intrinsic or extraneous, and explain the consequence, which is usually encoding failure or forgetting. On the AAQ or EBQ, cognitive load is a great explanatory tool when a study's results show that multitasking, distraction, or sleep deprivation hurt memory performance. Don't just name the term; say what got overloaded and why encoding suffered.
Working memory is the system; cognitive load is the strain on it. Working memory is the small mental workspace that holds and manipulates information right now. Cognitive load measures how much of that workspace a task is consuming. If a question asks about the structure (capacity, duration, the thing that does the holding), that's working memory. If it asks about the demand a task places on you (too many steps, too much distraction), that's cognitive load. You can't have load without something to load.
Cognitive load is the total mental effort a task demands from your limited-capacity working memory.
Intrinsic cognitive load comes from the inherent complexity of the material, while extraneous cognitive load comes from unnecessary distractions or poor presentation.
When cognitive load exceeds working memory capacity, encoding fails, which is a major cause of forgetting.
Cognitive load connects to interference theory because competing information adds demand on working memory and crowds out what you're trying to learn.
Strategies like the spacing effect and rehearsal work because they keep cognitive load within what working memory can actually handle.
On the exam, cognitive load usually appears in application scenarios, so be ready to identify whether the load is intrinsic or extraneous and explain the memory consequence.
Cognitive load is the amount of mental effort or working memory resources a task requires. It has two parts, intrinsic load (the task's built-in difficulty) and extraneous load (unnecessary burdens like distractions or confusing formatting).
No. Working memory is the system with limited capacity (roughly 7 plus or minus 2 chunks), while cognitive load is the demand a task places on that system. Load is the weight; working memory is the backpack carrying it.
Intrinsic load is the difficulty baked into the material itself, like the number of interacting steps in a calculus problem. Extraneous load is mental effort wasted on things that don't help learning, like a noisy room or a cluttered slide. You can reduce extraneous load, but intrinsic load mostly stays fixed.
Yes, mostly through encoding failure. When a task demands more than working memory can hold, some information never gets encoded into long-term memory in the first place, so there's nothing to retrieve later. This is also why multitasking while studying backfires.
Interference happens when competing information (old or new) disrupts memory, and that competition adds to cognitive load. Both ideas point to the same bottleneck, which is that working memory can only process so much at once. AP-style questions often ask you to connect these two concepts directly.