What riskier decisions look like in the lab
In the main study, 45 college students played a computerized risk-taking game called the Balloon Analogue Risk Task. Players pump up a balloon to earn points; each pump adds reward but also raises the chance the balloon will burst and wipe out the earnings. Compared with the control group, students with short video addiction pumped more, reacted faster, and burst more balloons—but mainly when short video cues were shown in the background [1]. Without those cues, the two groups did not differ significantly in risk decisions, whether they were winning or losing [1].
That detail matters: the difference was not a constant, all-purpose recklessness. It appeared when the environment contained reminders of short videos, which suggests the addiction is tied to cue-triggered decision-making rather than a blanket inability to judge risk [1].
Why short video cues seem to pull the lever
The brain data help explain the cue effect. Using functional near-infrared spectroscopy (fNIRS), a non-invasive way to measure blood-flow changes in the outer parts of the brain, the researchers found that students with short video addiction showed increased activation in the right orbitofrontal cortex and right frontopolar area during risk decisions with short video cues. The control group showed no activation in those regions [1].
These regions sit at the front of the brain and are involved in weighing rewards and guiding choices. Their stronger response in the addiction group is consistent with the idea that short video cues become unusually salient—they grab attention and may tilt the balance toward seeking a bigger reward [1]. The study's authors suggest this cue sensitivity helps explain why addicted students pursued higher rewards and accepted more risk [1].
Losses hit harder in the addicted group
The same study found that students with short video addiction were more sensitive to losing than to winning. Their orbitofrontal cortex activated significantly in response to losses but not gains [1]. When short video cues were present and a reward was lost, additional activation appeared in the frontopolar area and the left dorsolateral prefrontal cortex [1].
This pattern suggests that the addiction group's brains were tracking negative outcomes more strongly, at least under cue conditions. The authors interpret the combination—heightened cue sensitivity plus heightened loss sensitivity—as a push toward higher-risk choices in pursuit of larger rewards [1]. It is an interpretation of the observed activation pattern, not a proven causal chain.
What this does not settle
The evidence is limited in scope. The main human study included only 45 students, and the findings describe associations between short video addiction, behavior, and prefrontal activation rather than proving that addiction causes risky decision-making [1]. Related work on smartphone addiction in college students also reports riskier decision-making and altered prefrontal activation during a gambling task [2], and a review of continuous short-video viewing points to attention and reward mechanisms in the prefrontal cortex affecting decision-making [3]. But those studies do not isolate short video addiction specifically.
Animal experiments show that manipulating dopamine receptors in the prefrontal cortex can shift risky choice in rats [4][5], offering a possible biological pathway. However, rats do not model college students or short video use, so this remains a clue about mechanisms, not an explanation of the human findings.
Sources used in this answer
How short video addiction affects risk decision-making behavior in college students based on fNIRS technology
College students with short video addiction showed higher risk-taking, shorter reaction times, and more balloon explosions than controls when short video cues were present, along with increased right orbitofrontal and right frontopolar activation to cues and greater orbitofrontal activation to losses.
Exploring the impact of smartphone addiction on decision-making behavior in college students: an fNIRS study based on the Iowa Gambling Task
College students with smartphone addiction engaged in riskier decision-making than controls and showed altered prefrontal cortex activation during the Iowa Gambling Task.
Attention and Reward Mechanisms in Continuous Short-Video Viewing: Cognitive and Behavioral Effects
Continuous short-video viewing is linked to attention and reward mechanisms in the prefrontal cortex that affect decision-making in people with short-video addiction.
Risky decision-making following prefrontal D1 receptor manipulation
Rats with viral overexpression of prefrontal dopamine D1 receptors exhibited maladaptive risky decision-making that returned to control levels when the overexpression was terminated.
Prefrontal Dopaminergic Regulation of Cue-Guided Risky Decision-Making Performance in Rats
In rats, stimulating D1 receptors or inhibiting D2 receptors in the medial prefrontal cortex increased risk selection, while inhibiting D1 or stimulating D2 receptors reduced it, indicating dopaminergic regulation of cue-guided risky decision-making.