Abstract
The experience of time has long posed a challenge for psychological theory, particularly in attempts to reconcile quantitative models of duration with the qualitative and embodied nature of temporal perception. Building on the author’s research background in astrophysics and cognitive psychology, The Psychology of Human Temporality takes up the challenge by offering a framework for understanding human time experience through relational and dynamical principles. Engaging closely with Gestalt psychology, the book examines how the ethology of human movement and allometry can affect the human feeling of phase transitions and the perception of time, phenomena that are difficult to scale statistically.
Chapter 1 presents the foundational theme of the book: the experience of time involves a phase transition that opens the field of human temporality to inquiry informed by Gestalt psychology. Although Gestalt is an indescribable psychological construct, it is regarded as a perceptual approach to understanding human temporality. Gilden extends this foundation by engaging with experimental psychology and the physics of dynamical systems. Chapter 2 focuses on the basic ideas that flow from Gestalt. Gilden distinguishes between position and place: while positions denote where things are located in the physical world, places, as part of an environment endowed with relations and meaning, carry significance, including being sources of comfort, belonging, and status. Through factors like proximity and color similarity within places, emergent properties are formed, and the sense of togetherness is created by the mental properties. Tracing this intellectual lineage from Aristotle to Kurt Koffka, Gilden recognizes their shared focus on unified wholeness and togetherness arising from the grouping principles of proximity and viscosity.
Chapters 3 and 4 focus on grouping in space and time, distinguishing spatial grouping from temporal grouping, the latter being associated with phase transitions. Examples involving melody and noise are employed to argue that the shifting landscape of sight, sound, and touch in daily life is packaged into events, happenings, and other time-based groups instead of being experienced as a confusion of color, movement, and sound. Once the phase transition becomes phase succession, the being in relation—“the togetherness, the glue that binds the two syllables into a word”—is lost (p. 53). In terms of memory, when the sense of togetherness within a group is lost, forgetting occurs.
Chapters 5 and 6 are devoted to the activated mind and the decay process, elaborating on memory and the nature of human temporality. Gilden reviews three priming paradigms, namely semantic, motor/response, and negative, each revealing that activation decays within a few seconds. Although the shapes of the decay curves differ across paradigms, their timescale remains remarkably consistent. The theory of priming decay and the theory of phase transition are introduced to illustrate physical decay laws and the phenomenology of Tau, the characteristic lifetime of activation decay, which becomes the central theoretical construct for the remainder of the book.
Chapters 7 to 9 concentrate on the dynamics between body and time. Gilden begins with an introduction to allometry, the study of scaling relationships between body size and physiological or behavioral properties in organisms. As a bridging discipline at the intersection of field observation, statistical analysis, and theoretical biology, allometry involves a substantial number of equations. The final chapter returns to the beginning, pondering upon the passage of time and identifying the central construct in human temporality—activation decay—without which neither phase transitions nor felt time would occur.
Overall, Gilden’s work makes three major contributions. First, it succeeds in revealing the psychology of human temporality through an interdisciplinary lens. From scalar expectancy theory (SET) to Chinese yin/yang logic, and from melodic landscape to a succession of sound islands, the book freely transcends the boundaries of different disciplines and cultures. Second, adopting a Gestalt approach, the book highlights a holistic view of human temporality. As Straub (2014) writes, the human being exists “as an anthropological holism of a socially existing corporeal person” (p. 42), evading various types of measurement; thus, a holistic view with appropriate experimental measurement is fitting. This emphasis on holism closely resonates with Chinese culture, from Chinese philosophy to traditional Chinese medicine (Santangelo & Boros, 2019, p. 12). Traditional Chinese medicine regards the human body as an organic whole and a mind-body unity; therefore, when treating a sore throat, a doctor might prescribe treating the entire system to clear heat rather than merely addressing the throat. Gilden also analyzes the formation of melody and rhythm by presenting a melodic landscape holistically shaped by relational “other” keys (p. 53). Third, the book features abundant equations and experimental figures. Without Stevens’ law, Weber’s law, and SET and their associated equations, the interval timing and duration continuum closely tied to human temporality might remain unclear. Previous books on human temporality generally avoid rate equations, yet these are essential in this work, particularly when settling the shape of activation decay.
Although the book does succeed in clarifying human temporality to a great extent, there remains potential to enrich its analysis. First, while the abundance of equations is an advantage, it can also be a disadvantage, as the emphasis on empirical experiments can obscure the book’s philosophical dimension. Moreover, the work might have achieved more had it engaged with Bergson’s (2001, p. 91) concept of duration and Deleuze’s (2021, p. 35) ideas of the rhizome and the fold, both of which reconceptualize temporality and experience as continuous processes rather than discrete units. In this respect, they would have offered a productive philosophical complement to Gilden’s account of phase transition and activation decay, especially in relation to the emergence of temporal structure from continuous experience. Similarly, Böhme’s (2018, p. 22) theory of the aesthetics of atmosphere, which also addresses sensory psychophysics and wholeness, could enrich Gilden’s framework by showing how human temporality emerges through embodied engagement with the environment. For example, Wendt’s (2025, p. 9) What Is Psychology About? The Philosophical Foundations of Its Subject-Matter delves deeply and comprehensively into the interlacement of philosophy and psychology, thereby offering a broader meta-theoretical frame within which Gilden’s interdisciplinary approach could be situated.
Second, engaging with recent works on subjectivity could deepen the book’s psychological dimension. For instance, Eagle’s (2024, p. 27) work on human subjective experience also adopts a multidisciplinary approach to analyze Gestalt psychology and human subjective experience. This perspective could help further specify how Gilden’s temporality is not only structurally defined through decay dynamics but also experientially constituted at the level of subjectivity.
Generally speaking, rooted in Gestalt psychology and focused on activation decay and rhythmic phase transition, the book innovatively examines the dynamics of memory decay and human temporality by integrating experimental psychology, music theory, and allometric biology. This empirically grounded yet conceptually ambitious work invites further reflection on how psychological theories of time might accommodate embodied, rhythmic, and cross-cultural dimensions of experience. We believe it will appeal to students, researchers, and anyone seeking deeper insight into the nature of time, body, and mind through an interdisciplinary lens.
