Luke Clark
Biographic Data
| ID | 3657802 |
|---|---|
| NAME | Luke Clark |
| GIVEN NAMES | Luke |
| FAMILY NAME | Clark |
| SIGNATURE | CLARK L |
| AFFILIATIONS | University of British Columbia |
| ORCID | 0000-0003-1103-2422 |
| VERIFIED | Yes |
| TOTAL WORKS | 25 |
| TOTAL CITATIONS | 7 |
| AUTHOR COUNT | 25 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2008 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 2 |
Open science practices in behavioral addictions: An exploratory survey
A clarion call to the addiction science community: It's time to resist the anti-scientific policies of the US Trump administration
Behavioral indices of effort discounting are related to perseverance on a creativity task and to bipolar disorder
A longitudinal replication study testing migration from video game loot boxes to gambling in British Columbia, Canada
These data provide further prospective evidence for gambling 'migration' in a sample recruited in Western Canada, indicating that young adults who spend money on loot boxes are at elevated risk for real-money gambling
Bipolar disorders and creativity: The roles of ambition, effort-based decision-making, and exploration
The findings suggest the mechanisms underlying creativity may not inherently differ for those with BD compared to controls. Ambition, especially when combined with effort and willingness, drives creative accomplishments. Strategic use of exploration versus exploitation was associated with greater creativity among less ambitious individuals without BD. A nuanced, multivariate approach is needed to understand the bipolar-creativity relationship acr…
Examining the illusion of control via outcome sequences in online slot machine gambling
The licensing effect in gambling choice: A daily diary study
Between-session chasing of losses and wins in an online eCasino
Watch and yearn? Effects of watching gambling livestreams on cravings
Socioeconomic correlates of the lottery rollover effect in Toronto, Canada
Background: In a lottery with a progressive jackpot, the rollover effect refers to an increase in revenue or engagement with an accumulating jackpot size. Using an ecological dataset of lottery ticket sales aggregated by postcode, we test two corollaries of the rollover effect. First, how does the rollover effect change in neighborhoods with higher or lower socioeconomic status? Second, how do fluctuations on a progressive-prize lottery affect th…
A Clean Slate: Adapting the Realization Effect to Online Gambling and Its Effectiveness in People With Gambling Problems
Betting more after losses (i.e., “loss‐chasing”) is a central clinical feature of disordered gambling. According to prospect theory, increasing risk‐seeking following losses could arise from a failure to “re‐reference.” By contrast, successful re‐referencing between successive decisions closes the mental account, and any losses are regarded as final or realized ; gamblers should not chase realized losses. The present study sought to test this “re…
The landscape of open science in behavioral addiction research: Current practices and future directions
Open science refers to a set of practices that aim to make scientific research more transparent, accessible, and reproducible, including pre-registration of study protocols, sharing of data and materials, the use of transparent research methods, and open access publishing. In this commentary, we describe and evaluate the current state of open science practices in behavioral addiction research. We highlight the specific value of open science pract…
The gamblers of the future? Migration from loot boxes to gambling in a longitudinal study of young adults
Cross-sectional studies have established a robust correlational link between loot box engagement and problem gambling, but the causal connections are unknown. This longitudinal study tested for ‘migration’ from loot box use to gambling initiation 6-months later. A sample of gamers (aged 18–26) was stratified into two subgroups at baseline: 415 non-gamblers and 221 gamblers. Self-reported engagement with video game microtransactions distinguished …
Gambling along the schizotypal spectrum: The associations between schizotypal personality, gambling-related cognitions, luck, and problem gambling
Gambling disorder is associated with reduced sensitivity to expected value during risky choice
Cashless gambling and the pain of paying: Effects of monetary format on slot machine gambling
Advances in cashless technologies create a dilemma for gambling regulators. Research indicates that cash purchases entail a 'pain of paying' that is attenuated with more abstract forms of payment, yet limited research has directly tested the impact of mode of payment on gambling behavior. Across two experiments, community-recruited gamblers were randomized to use an authentic slot machine in the laboratory, under different conditions of monetary …
The Conceptual Framework of Harmful Gambling: A revised framework for understanding gambling harm
Associations between loot box use, problematic gaming and gambling, and gambling-related cognitions
Heterogeneity in Disordered Gambling: Decision-Making and Impulsivity in Gamblers Grouped by Preferred Form
Background: Previous research has indicated that disordered gamblers display deficits in impulsivity and risky decision-making, compared to healthy control groups. However, disordered gamblers are not a homogenous group, and differences in performance on neurocognitive tasks may be related to the form of gambling in which an individual chooses to engage. The present study used neurocognitive tasks and questionnaire measures to ascertain group dif…
On the Counterfactual Nature of Gambling Near‐misses: An Experimental Study
Research on gambling near-misses has shown that objectively equivalent outcomes can yield divergent emotional and motivational responses. The subjective processing of gambling outcomes is affected substantially by close but non-obtained outcomes (i.e. counterfactuals). In the current paper, we investigate how different types of near-misses influence self-perceived luck and subsequent betting behavior in a wheel-of-fortune task. We investigate the…
Put Your Money Where Your Mouth Is!’: Effects of Streaks on Confidence and Betting in a Binary Choice Task
Human choice under uncertainty is influenced by erroneous beliefs about randomness. In simple binary choice tasks, such as red/black predictions in roulette, long outcome runs (e.g. red, red, red) typically increase the tendency to predict the other outcome (i.e. black), an effect labeled the "gambler's fallacy." In these settings, participants may also attend to streaks in their predictive performance. Winning and losing streaks are thought to a…
Learning and Affect Following Near‐Miss Outcomes in Simulated Gambling
Gambling near‐misses are non‐rewarded events that resemble a winning configuration. Past research using slot machines has shown that moderate rates of near‐misses increase gambling persistence, but the mechanisms supporting this persistence are unclear. One hypothesis is that near‐misses are mistakenly interpreted as signals of skill acquisition, supporting learning and fuelling the ‘illusion of control’. A slot machine simulation was administere…
Trait gambling cognitions predict near-miss experiences and persistence in laboratory slot machine gambling
Near-miss' outcomes (i.e., unsuccessful outcomes close to the jackpot) have been shown to promote gambling persistence. Although there have been recent advances in understanding the neurobiological responses to gambling near-misses, the psychological mechanisms involved in these events remain unclear. The goal of this study was to explore whether trait-related gambling cognitions (e.g., beliefs that certain skills or rituals may help to win in ga…
Impulsive choice and altruistic punishment are correlated and increase in tandem with serotonin depletion
Human cooperation may partly depend on the presence of individuals willing to incur personal costs to punish noncooperators. The psychological factors that motivate such 'altruistic punishment' are not fully understood; some have argued that altruistic punishment is a deliberate act of norm enforcement that requires self-control, while others claim that it is an impulsive act driven primarily by emotion. In the current study, we addressed this qu…
Impulsivity as a vulnerability marker for substance-use disorders: Review of findings from high-risk research, problem gamblers and genetic association studies
Learning and Affect Following Near‐Miss Outcomes in Simulated Gambling
Gambling near‐misses are non‐rewarded events that resemble a winning configuration. Past research using slot machines has shown that moderate rates of near‐misses increase gambling persistence, but the mechanisms supporting this persistence are unclear. One hypothesis is that near‐misses are mistakenly interpreted as signals of skill acquisition, supporting learning and fuelling the ‘illusion of control’. A slot machine simulation was administere…
On the Counterfactual Nature of Gambling Near‐misses: An Experimental Study
Research on gambling near-misses has shown that objectively equivalent outcomes can yield divergent emotional and motivational responses. The subjective processing of gambling outcomes is affected substantially by close but non-obtained outcomes (i.e. counterfactuals). In the current paper, we investigate how different types of near-misses influence self-perceived luck and subsequent betting behavior in a wheel-of-fortune task. We investigate the…
Trait gambling cognitions predict near-miss experiences and persistence in laboratory slot machine gambling
Near-miss' outcomes (i.e., unsuccessful outcomes close to the jackpot) have been shown to promote gambling persistence. Although there have been recent advances in understanding the neurobiological responses to gambling near-misses, the psychological mechanisms involved in these events remain unclear. The goal of this study was to explore whether trait-related gambling cognitions (e.g., beliefs that certain skills or rituals may help to win in ga…
Impulsivity as a vulnerability marker for substance-use disorders: Review of findings from high-risk research, problem gamblers and genetic association studies
Impulsive choice and altruistic punishment are correlated and increase in tandem with serotonin depletion
Human cooperation may partly depend on the presence of individuals willing to incur personal costs to punish noncooperators. The psychological factors that motivate such 'altruistic punishment' are not fully understood; some have argued that altruistic punishment is a deliberate act of norm enforcement that requires self-control, while others claim that it is an impulsive act driven primarily by emotion. In the current study, we addressed this qu…
Learning and Affect Following Near‐Miss Outcomes in Simulated Gambling
Gambling near‐misses are non‐rewarded events that resemble a winning configuration. Past research using slot machines has shown that moderate rates of near‐misses increase gambling persistence, but the mechanisms supporting this persistence are unclear. One hypothesis is that near‐misses are mistakenly interpreted as signals of skill acquisition, supporting learning and fuelling the ‘illusion of control’. A slot machine simulation was administere…
Trait gambling cognitions predict near-miss experiences and persistence in laboratory slot machine gambling
Near-miss' outcomes (i.e., unsuccessful outcomes close to the jackpot) have been shown to promote gambling persistence. Although there have been recent advances in understanding the neurobiological responses to gambling near-misses, the psychological mechanisms involved in these events remain unclear. The goal of this study was to explore whether trait-related gambling cognitions (e.g., beliefs that certain skills or rituals may help to win in ga…
Put Your Money Where Your Mouth Is!’: Effects of Streaks on Confidence and Betting in a Binary Choice Task
Human choice under uncertainty is influenced by erroneous beliefs about randomness. In simple binary choice tasks, such as red/black predictions in roulette, long outcome runs (e.g. red, red, red) typically increase the tendency to predict the other outcome (i.e. black), an effect labeled the "gambler's fallacy." In these settings, participants may also attend to streaks in their predictive performance. Winning and losing streaks are thought to a…
On the Counterfactual Nature of Gambling Near‐misses: An Experimental Study
Research on gambling near-misses has shown that objectively equivalent outcomes can yield divergent emotional and motivational responses. The subjective processing of gambling outcomes is affected substantially by close but non-obtained outcomes (i.e. counterfactuals). In the current paper, we investigate how different types of near-misses influence self-perceived luck and subsequent betting behavior in a wheel-of-fortune task. We investigate the…
Associations between loot box use, problematic gaming and gambling, and gambling-related cognitions
Heterogeneity in Disordered Gambling: Decision-Making and Impulsivity in Gamblers Grouped by Preferred Form
Background: Previous research has indicated that disordered gamblers display deficits in impulsivity and risky decision-making, compared to healthy control groups. However, disordered gamblers are not a homogenous group, and differences in performance on neurocognitive tasks may be related to the form of gambling in which an individual chooses to engage. The present study used neurocognitive tasks and questionnaire measures to ascertain group dif…
The Conceptual Framework of Harmful Gambling: A revised framework for understanding gambling harm
Gambling disorder is associated with reduced sensitivity to expected value during risky choice
Cashless gambling and the pain of paying: Effects of monetary format on slot machine gambling
Advances in cashless technologies create a dilemma for gambling regulators. Research indicates that cash purchases entail a 'pain of paying' that is attenuated with more abstract forms of payment, yet limited research has directly tested the impact of mode of payment on gambling behavior. Across two experiments, community-recruited gamblers were randomized to use an authentic slot machine in the laboratory, under different conditions of monetary …
Gambling along the schizotypal spectrum: The associations between schizotypal personality, gambling-related cognitions, luck, and problem gambling
The landscape of open science in behavioral addiction research: Current practices and future directions
Open science refers to a set of practices that aim to make scientific research more transparent, accessible, and reproducible, including pre-registration of study protocols, sharing of data and materials, the use of transparent research methods, and open access publishing. In this commentary, we describe and evaluate the current state of open science practices in behavioral addiction research. We highlight the specific value of open science pract…
The gamblers of the future? Migration from loot boxes to gambling in a longitudinal study of young adults
Cross-sectional studies have established a robust correlational link between loot box engagement and problem gambling, but the causal connections are unknown. This longitudinal study tested for ‘migration’ from loot box use to gambling initiation 6-months later. A sample of gamers (aged 18–26) was stratified into two subgroups at baseline: 415 non-gamblers and 221 gamblers. Self-reported engagement with video game microtransactions distinguished …
Between-session chasing of losses and wins in an online eCasino
Watch and yearn? Effects of watching gambling livestreams on cravings
Socioeconomic correlates of the lottery rollover effect in Toronto, Canada
Background: In a lottery with a progressive jackpot, the rollover effect refers to an increase in revenue or engagement with an accumulating jackpot size. Using an ecological dataset of lottery ticket sales aggregated by postcode, we test two corollaries of the rollover effect. First, how does the rollover effect change in neighborhoods with higher or lower socioeconomic status? Second, how do fluctuations on a progressive-prize lottery affect th…
A Clean Slate: Adapting the Realization Effect to Online Gambling and Its Effectiveness in People With Gambling Problems
Betting more after losses (i.e., “loss‐chasing”) is a central clinical feature of disordered gambling. According to prospect theory, increasing risk‐seeking following losses could arise from a failure to “re‐reference.” By contrast, successful re‐referencing between successive decisions closes the mental account, and any losses are regarded as final or realized ; gamblers should not chase realized losses. The present study sought to test this “re…
A clarion call to the addiction science community: It's time to resist the anti-scientific policies of the US Trump administration
Behavioral indices of effort discounting are related to perseverance on a creativity task and to bipolar disorder
A longitudinal replication study testing migration from video game loot boxes to gambling in British Columbia, Canada
These data provide further prospective evidence for gambling 'migration' in a sample recruited in Western Canada, indicating that young adults who spend money on loot boxes are at elevated risk for real-money gambling
Bipolar disorders and creativity: The roles of ambition, effort-based decision-making, and exploration
The findings suggest the mechanisms underlying creativity may not inherently differ for those with BD compared to controls. Ambition, especially when combined with effort and willingness, drives creative accomplishments. Strategic use of exploration versus exploitation was associated with greater creativity among less ambitious individuals without BD. A nuanced, multivariate approach is needed to understand the bipolar-creativity relationship acr…
Examining the illusion of control via outcome sequences in online slot machine gambling
The licensing effect in gambling choice: A daily diary study
Open science practices in behavioral addictions: An exploratory survey
Psychology (23 works) · Gambling Behavior and Treatments (19 works) · Social Psychology (13 works) · Psychiatry (9 works) · Cognition (7 works) · Cognitive psychology (7 works) · Social Psychology (7 works) · Statistics (7 works) · Addiction (6 works) · Economics (6 works)