Premature release of action sequences in adolescent male rats.
Teen males, rat or human, show a unique early-action impulsivity you can spot and shape.
01Research in Context
What this study did
Marini et al. (2026) watched rats press levers for food.
They compared teen males, adult males, and females.
The team counted how often each rat pressed too soon during a sequence.
What they found
Teen male rats pressed early far more than any other group.
The extra jumps were not because they moved more or forgot the rules.
This points to a special boy-teen impulsivity style.
How this fits with other research
Panjeh et al. (2025) asked human teens about sleep and mood.
Night-owl boys reported more rash acts when upset, matching the rat leap.
Nevin et al. (2005) showed kids with ADHD pick now over later rewards.
The rat work says the urge to act early shows up even before rewards differ.
Together the papers draw one line: teen males, ADHD or not, share a quick-trigger profile.
Why it matters
You now have a clear marker: fast, out-of-sequence responses.
Watch for them during discrete-trial drills with teen male clients.
If you see early reaches, extra prompts, or button smashes, pause and reset.
Teach wait rules and release cues before problem behavior grows.
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02At a glance
03Original abstract
Adolescence is a period of transition from childhood to adulthood in which subjects exhibit characteristic behaviors, such as increases in impulsivity, social interactions, novelty-seeking and risk-taking behaviors. Previous studies have shown that adolescents often respond prematurely in operant tasks, but it remains unclear whether this behavior reflects general hyperactivity, cognitive impairments, or if it is a specific form of impulsivity. Here, we trained male and female adolescent and adult Long-Evans rats in a rewarded operant task that required withholding an action sequence for a 2.5 s waiting time. Adolescent males exhibited significantly more premature responses than females or adults, despite achieving similar reward rates. To test whether this behavior was associated with other traits, we assessed locomotor activity in the Open Field and recognition memory in the Y-maze. Locomotor activity and memory performance were comparable between groups, indicating that the increased premature responding observed in adolescent males was not readily explained by differences in general activity levels or cognitive performance. Together, these findings suggest that impulsive responding during adolescence shows a sex-dependent expression and reflects a distinct behavioral component within the context of this task, rather than belonging to broader behavioral differences. Understanding the specificity of adolescent impulsivity may provide insights into vulnerability to risk-taking and psychiatric disorders during adolescence.
Frontiers in Behavioral Neuroscience, 2026 · doi:10.3389/fnbeh.2026.1716850