Why Mixed LSAT Drills Beat Blocked Practice

Adrian Calloway

You sit down, you do a set of twenty Flaw questions in a row, and you get, um, eighteen of them right. Ninety percent. You feel like a genius, right? But then, two weeks later, you take a full thirty five minute Logical Reasoning section and the whole thing just collapses.

Nora Ashford

Ninety percent on that block, and then on the actual section you hit a wall. I, I remember doing that exact thing on PrepTest 89. I knocked out thirty Strengthen questions in a study session, felt unstoppable, and then on eighty nine, I hit a Parallel Flaw, immediately followed by a Weaken, sandwiched right before a Principle question. My brain just froze.

Adrian Calloway

PrepTest eighty nine is a notorious section for that exact reason. What you experienced, Nora, is the classic illusion of competence. When you do twenty identical question types, your brain completely skips the most difficult step in Logical Reasoning, which is diagnosis. You already know it is a Flaw question before you even read the prompt, so you never practice identifying the gap on your own.

Nora Ashford

Right, you are skipping the discrimination step entirely! You are just executing a routine. It is like practicing tennis where someone only serves to your forehand for two hours, and then on match day, suddenly they hit to your backhand.

Adrian Calloway

Precisely. In cognitive science, this is known as blocked practice versus interleaved practice. There was a study published in Applied Cognitive Psychology where researchers tested students using mixed practice on math problems versus blocked practice. The students using mixed practice scored forty three percent higher on tests taken a month later.

Nora Ashford

Forty three percent higher? A full month later? That is a massive difference for just changing the sequence of how you study.

Adrian Calloway

It is enormous. But here is the catch that trips everyone up. During the actual practice sessions, the students doing blocked practice felt like they were learning faster and making fewer mistakes. The interleaved group felt slow, clunky, and frustrated. But when it came to long term retention and actual test day performance, the interleaved group destroyed them.

Nora Ashford

Because the blocked group was relying on short term working memory, while the interleaved group was actually forcing their brains to build discrimination learning. They had to constantly ask, wait, what kind of problem is this, and what tool do I need to pull out of my toolbox right now?

Adrian Calloway

Exactly. So how do we translate this into an actionable LSAT study plan? We use what I call the twenty to eighty rule. You limit blocked practice to just twenty percent of your initial concept exposure. You learn what a Necessary Assumption is, you do five or ten of them to understand the mechanics, and then you stop.

Nora Ashford

So only twenty percent of your time on single question type drills. What does the other eighty percent look like?

Adrian Calloway

The other eighty percent of your drilling must be mixed, randomized sets. On LawHub, for instance, you build a set of twelve questions drawn randomly from across all Logical Reasoning types. And you aim for an eighty five second per question target.

Nora Ashford

Twelve questions, mixed types, eighty five seconds per question. Why twelve questions specifically?

Adrian Calloway

Twelve questions is short enough that you can review every single answer explanation deeply in one sitting, but long enough to force your brain through twelve rapid executive context switches. Question one is a Strengthen, question two is a Main Point, question three is a Flaw. Your brain is forced to reset its diagnostic radar every single time.

Nora Ashford

That executive context switch is everything. When I started mixing up my sets, my score initially dropped, and I got so frustrated. But looking back, that friction was the exact signal that my brain was finally working. It was that desirable difficulty reframe you always talk about.

Adrian Calloway

If it feels easy while you are drilling, you are probably wasting your time. That awkward, clumsy feeling of having to stop and re orient yourself on every question stem is the actual feeling of long term memory traces being built.

Nora Ashford

I love that. So instead of chasing ninety percent accuracy on easy single type blocks, embrace the messy twelve question mixed set. That is how you actually survive PrepTest eighty nine.

Adrian Calloway

Well said. Alright, good chatting, talk soon.