Pernille Hemmer

Pernille Hemmer
Rutgers, The State University of New Jersey | Rutgers · Department of Psychology (New Brunswick)

Ph.D.

About

44
Publications
4,112
Reads
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400
Citations
Citations since 2017
27 Research Items
243 Citations
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201720182019202020212022202301020304050
201720182019202020212022202301020304050
201720182019202020212022202301020304050
Additional affiliations
September 2006 - March 2011
University of California, Irvine
Position
  • PhD Student

Publications

Publications (44)
Article
Beliefs are, in many ways, central to psychology and, in turn, consistency is central to belief. Theories in philosophy and psychology assume that beliefs must be consistent with each other for people to be rational. That people fail to hold fully consistent beliefs has, therefore, been the subject of much theorizing, with numerous mechanisms propo...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Article
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Article
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Chapter
Beliefs play a central role in our lives. They lie at the heart of what makes us human, they shape the organization and functioning of our minds, they define the boundaries of our culture, and they guide our motivation and behavior. Given their central importance, researchers across a number of disciplines have studied beliefs, leading to results a...
Preprint
Decades of findings in psychology appear to indicate that human belief is thoroughly irrational. At best, beliefs might be formed by heuristic processes that predictably lead to suboptimal outcomes. At worst, they are slaves to motivated reasoning, which allows people to come to whichever conclusions they prefer. In this paper, we argue that belief...
Article
We introduce the first set of stimuli designed to resolve methodological and theoretical issues that have muddled the interpretation of results on the memorability of supernatural concepts (e.g., ghosts, souls, spirits), an important line of research in the cognitive science of religion (Barrett, 2007). We focus here on Boyer’s (1994), Boyer, 2001)...
Article
We evaluate the literature on the memorability of supernatural concepts (e.g., gods, ghosts, souls), itself part of a growing body of work in the emerging cognitive science of religion (Barrett, 2007). Specifically, we focus on Boyer’s (1994a, 2000, 2001) Minimally Counterintuitive ( MCI ) hypothesis according to which supernatural concepts tap a c...
Preprint
We introduce the first set of normed stimuli designed to resolve methodological and theoretical issues that have muddled the interpretation of results on the memorability of supernatural concepts (e.g., ghosts, souls, spirits), an important line of research in the Cognitive Science of Religion (Barrett, 2000). We focus here on Boyer’s (1994, 2000,...
Preprint
Despite limited memory capacity, children are exceptional learners. How might children engage in meaningful learning despite limited memory systems? Past research suggests that adults integrate category knowledge and noisy episodic traces to aid recall when episodic memory is noisy or incomplete (e.g. Hemmer & Steyvers, 2009). We suspect children u...
Article
Terrorist attacks carried out by individuals have significantly accelerated over the last twenty years. This type of lone-actor (LA) terrorism stands as one of the greatest security threats of our time. While the research on LA behavior and characteristics has produced valuable information on demographics, classifications, and warning signs, the re...
Preprint
We offer a systematic evaluation of the literature on the memorability of supernatural concepts (e.g., gods, ghosts, souls), itself part of a growing body of work in the newly-emerging cognitive science of religion (Barrett, 2000). Specifically, we focus on Boyer’s (1994, 2000, 2001) pioneering Minimally Counterintuitive (MCI) hypothesis according...
Preprint
Terrorist attacks carried out by individuals or single cells have significantly accelerated over the last 20 years. This type of terrorism, defined as lone-actor (LA) terrorism, stands as one of the greatest security threats of our time. Research on LA behavior and characteristics has emerged and accelerated over the last decade. While these studie...
Article
Despite limited memory capacity, children are exceptional learners. How might children engage in meaningful learning despite limited memory systems? Past research suggests that adults integrate category knowledge and noisy episodic traces to aid recall when episodic memory is noisy or incomplete (e.g. Hemmer & Steyvers, 2009a,b). We suspect childre...
Conference Paper
Full-text available
Previous research evaluating the influence of category knowledge on memory found that children, like adults, rely on category information to facilitate recall (Duffy, Huttenlocher, & Crawford, 2006). A model that combines category and target information (Integrative) provides a superior fit to preschoolers recall data compared to a category only (P...
Article
Full-text available
Within a Bayesian framework, using meta-data, we present the first computational implementation of inhibition, as specified by the Theory of Mind Mechanism (ToMM) model, to account for both the developmental shift from three to four years of age and the change in children’s performances between high-demand and low-demand false-belief tasks. A Bayes...
Article
Full-text available
The development of memory theory has been constrained by a focus on isolated tasks rather than the processes and information that are common to situations in which memory is engaged. We present results from a study in which 453 participants took part in five different memory tasks: single-item recognition, associative recognition, cued recall, free...
Article
Full-text available
Expectations learned from our perceptual experiences, culture, and language can shape how we perceive, interact with, and remember features of the past. Here, we questioned whether environment also plays a role. We tested recognition memory for color in Bolivia's indigenous Tsimanè people, who experience a different color environment than standard...
Preprint
The development of memory theory has been constrained by a focus on isolated tasks rather than the processes and information that are common to situations in which memory is engaged. We present results from a study in which 453 participants took part in five different memory tasks: single-item recognition, associative recognition, cued recall, free...
Article
Recent evidence suggests that experienced events are often mapped to too many episodic states, including those that are logically or experimentally incompatible with one another. For example, episodic over-distribution patterns show that the probability of accepting an item under different mutually exclusive conditions violates the disjunction rule...
Article
Full-text available
Bayesian models of cognition provide a powerful way to understand the behavior and goals of individuals from a computational point of view. Much of the focus in the Bayesian cognitive modeling approach has been on qualitative model evaluations, where predictions from the models are compared to data that is often averaged over individuals. In many c...
Conference Paper
Full-text available
It is well known that the context of a scene can have a strong effect on the identification of objects in the scene (e.g., Biederman, 1972). However, it is unclear what role global versus local context plays on episodic memory for objects. We present results from a series of experiments that evaluate the degree to which the global and local context...
Conference Paper
Full-text available
Expectations learned from our environment are known to exert strong influences on episodic memory. Furthermore, people have prior expectations for universal color labels and their associated hue space—a salient property of the environment. In three experiments, we assessed peoples' color naming preferences, and expectation for color. Using a novel...
Conference Paper
Full-text available
Expectations learned from our environment are known to exert strong influences on episodic memory. Furthermore, people have prior expectations for universal color labels and their associated hue space—a salient property of the environment. In three experiments, we assessed peoples' color naming preferences, and expectation for color. Using a novel...
Article
Full-text available
Categorical knowledge and episodic memory have traditionally been viewed as separate lines of inquiry. Here, we present a perspective on the interrelatedness of categorical knowledge and reconstruction from memory. We address three underlying questions: What knowledge do people bring to the task of remembering? How do people integrate that knowledg...
Article
Navigating through a visual maze relies on the strategic use of eye movements to select and identify the route. We studied navigation through novel and familiar mazes that were viewed from above and traversed by a mouse cursor. Mazes (12x12 cells) of varying levels of complexity were randomly generated. The same maze was tested on two consecutive t...
Article
Full-text available
The role of experience in memory, specifically the word frequency (WF) mirror effect showing higher hit rates and lower false alarm rates for low-frequency words, is one of the hallmarks of memory. However, this "regularity of memory" is limited because normative WF has been treated as discrete (low vs. high). We evaluate the extent to which the pr...
Article
Recall for the height of a person can be influenced not only by general knowledge about heights of people, but also by specific knowledge about the height of men and women. We assess the relative contribution of this type of prior knowledge on reconstructive memory. We present an empirical study testing recall for the height of females, males and a...
Article
Full-text available
In some eyewitness situations, a group of individuals might have witnessed the same sequence of events. We consider the problem of aggregating the event sequences as recalled by a small number of individuals with the goal to approximate the true sequence of events as best as possible. We present a Bayesian analysis of this aggregation problem that...
Article
Full-text available
Prior knowledge can have a large influence on recall when the memory for the original event is error prone or incomplete. We investigated the interaction between memory and prior knowledge in a recall task involving natural objects such as fruits and vegetables. We first quantified prior knowledge for the sizes of objects in a norming experiment. W...
Conference Paper
Full-text available
Abstract When,individuals,independently,recollect events,or retrieve facts from memory, how can we aggregate these retrieved memories to reconstruct the actual set of events or facts? In this research, we report the performance of individuals in a series of general knowledge tasks, where the goal is to reconstruct from memory the order of historic...
Article
Full-text available
It is well established that prior knowledge influences reconstruction from memory, but the specific interactions of memory and knowledge are unclear. Extending work by Huttenlocher et al. (Psychological Review, 98 [1991] 352; Journal of Experimental Psychology: General, 129 [2000] 220), we propose a Bayesian model of reconstructive memory in which...
Article
Full-text available
Recall of objects in natural scenes can be influenced not only by episodic but also by semantic memory. To model the statistical regularities that might be encoded in semantic memory, we applied a topic model to a large database of labeled images. We then incorporated the learned topics in a dual route topic model for recall that explains how and w...
Article
Full-text available
In dynamic decision-making environments, observers must continuously adjust their decision-making strategies. Previous research has focused on internal fluctuations in decision mechanisms, without regard to how these changes are induced by environmental changes. We developed a simple paradigm in which we manipulated task difficulty, thereby inducin...
Article
Full-text available
When individuals independently recollect events or retrieve facts from memory, how can we aggregate these retrieved memories to reconstruct the actual set of events or facts? In this research, we report the performance of individuals in a series of general knowledge tasks, where the goal is to reconstruct from memory the order of historic events ,...

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