The incentive-sensitization theory (IST) of addiction was first published in 1993, proposing that (a) brain mesolimbic dopamine systems mediate incentive motivation ("wanting") for addictive drugs and other rewards, but not their hedonic impact (liking) when consumed; and (b) some individuals are vulnerable to drug-induced long-lasting sensitization of mesolimbic systems, which selectively amplifies their "wanting" for drugs without increasing their liking of the same drugs. Here we describe the origins of IST and evaluate its status 30 years on. We compare IST to other theories of addiction, including opponent-process theories, habit theories of addiction, and prefrontal cortical dysfunction theories of impaired impulse control. We also address critiques of IST that have been raised over the years, such as whether craving is important in addiction and whether addiction can ever be characterized as compulsive. Finally, we discuss several contemporary phenomena, including the potential role of incentive sensitization in behavioral addictions, the emergence of addiction-like dopamine dysregulation syndrome in medicated Parkinson's patients, the role of attentional capture and approach tendencies, and the role of uncertainty in incentive motivation.
Our review, situated within the context of the United States, explores how societal forces shape youths' racial socialization processes. Specifically, we explore how youths learn beliefs about race through interactions with their environment, how these processes affect youths' engagement with race in multiple contexts, and how they contribute to the perpetuation and dismantling of racial inequality. First, we discuss key psychological theories that inform our understanding of racial socialization. Second, we discuss how families, peers, media, and environmental cues shape racial socialization processes. Finally, we discuss interventions to enhance racial socialization and offer directions for future psychological research to advance our understanding of both racial and broader socialization processes in the United States and internationally.
Therapeutic claims about many psychedelic drugs have not been evaluated in any studies of even modest rigor. The science of psychedelic drugs is strengthening, however, making it easier to differentiate some promising findings amid the hype that suffuses this research area. Ketamine has risks of adverse side effects (e.g., addiction and cystitis), but multiple studies suggest it can benefit individuals with treatment-resistant depression. Other therapeutic signals from psychedelic drug research that merit rigorous replication studies include 3,4-Methylenedioxymethamphetamine (MDMA) for post-traumatic stress disorder (PTSD) and psilocybin for depression, end of life dysphoria, and alcohol use disorder. The precise mechanisms through which psychedelic drugs can produce benefit and harm are not fully understood. Rigorous research is the best path forward for evaluating the therapeutic potential and mechanisms of psychedelic drugs. Policies governing the clinical use of these drugs should be informed by evidence and prioritize the protection of public health over the profit motive.
In many instances, emotions do not simply happen to people by chance. Often, people actively seek out an emotion by engaging in practices that have culturally evolved to evoke that emotion. Such practices tend to be perpetuated and spread if people want to experience the emotion, like to recall it and tell others about it, want to give the emotion to others and experience it together, and/or regard the emotion as a sign of something wonderful. We illustrate this with a newly delineated emotion, kama muta. Many social practices around the world are structured to evoke kama muta. In those culturally evolved practices, and outside them, what typically evokes kama muta is a sudden intensification of communal sharing, or a sudden shift of attention to a communal sharing relationship. It seems probable that other social-relational emotions are also evoked by sudden changes in relationships or the sudden salience of a relationship. This change or saliencing may be incorporated in social practices that are perpetuated because they evoke the sought-after emotion. We suggest that such practices, as well as sudden changes in relationships that occur elsewhere, are especially promising places to discover social-relational emotions.
Gender identity, or people's deeply felt, internal sense of their gender, plays an important role in aggression perpetration and victimization. In this article, I review and organize the psychological research literatures on gender identity-based aggression. I first discuss the need to move beyond binary, cisgender understandings of gender by embracing expansive definitions that more fully capture people's experiences and identities. Next, I summarize relevant research indicating two paths from gender identity to aggression. In one path, individuals with a more masculine (i.e., dominant, agentic) gender identity use aggression proactively, motivated by pursuit of social dominance. In another path, individuals with a more uncertain (i.e., insecure, precarious) gender identity use aggression defensively-and often toward vulnerable, gender nonconforming targets-as a means of protecting their gender identity against threats. I end by identifying important areas for future research and considering how interventions might best mitigate gender identity-based aggression.
The capacity to change with experience infuses our perceptions, thoughts, and actions in and about the past, present, and future. The cognitive system supporting this capacity for change can be exquisitely responsive to external events and yet can influence how those external events affect us. This interplay between the external and internal has been a major theme of my lab group's research. We proposed that the fundamental ambiguity of subjective experience requires ongoing reality monitoring processes for evaluating its veridicality and proposed a source monitoring framework for exploring the encoding, activation, and evaluation of information. We further proposed a functional architecture, a multiple-entry modular memory system, that characterizes component subprocesses of cognition that give rise to remembering and other subjective phenomena (e.g., knowledge, beliefs, emotion, consciousness, self). I first discuss these approaches and some issues they address and then describe some educational and professional experiences that provided opportunities to investigate this fascinating epistemological puzzle.
This article reviews two related approaches-conversation analysis (CA) and membership categorization analysis (MCA)-to sketch a systematic framework for exposing how categories and categorial phenomena are (re)produced in naturally occurring social interaction. In so doing, we argue that CA and MCA address recent concerns about psychological methods and approaches. After summarizing how categories are typically theorized and studied, we describe the main features of a CA approach to categories, including how this differs from conventional psychology. We review the core domains of research in CA and how categories can be studied systematically in relation to the basic machinery of talk and other conduct in interaction. We illustrate these domains through examples from different settings of recorded naturally occurring social interaction. After considering the applications that have arisen from CA and MCA, we conclude by drawing together the implications of this work for psychological science.