Indexicality (Hypothetical Contact) (IDXHYP)

Abstract

The Indexicality (Hypothetical Contact) Scale (IDXHYP) is a specialized, three-item psychometric measurement instrument developed by Kent Grayson and Radan Martinec (2004) to quantify consumer and visitor perceptions of hypothetical spatio-temporal connection between a physical object or setting and a historical or fictional persona. Grounded in the semiotic philosophy of Charles Sanders Peirce, the scale operationalizes perceived authenticity in cultural heritage, tourism, museum curation, and brand management settings where literal, verified physical contact is absent, yet imaginative projection creates an authenticating aura. Unlike traditional measures of indexical authenticity that require factual, historical physical contact, the IDXHYP measures the psychological ease and vividness with which an individual can envision a historical or fictional character having occupied the same spatio-temporal plane as the focal artifact or environment. Evaluated via a 7-point Likert scale (ranging from 1 = Strongly disagree to 7 = Strongly agree), the instrument exhibits robust psychometric properties across diverse empirical tourist settings, demonstrating high internal consistency (Cronbach’s α typically exceeding .80), distinct factor unidimensionality, and significant predictive validity for evaluations of authenticity, aesthetic appreciation, and overall engagement with commercial and cultural market offerings.

Keywords

Hypothetical indexicality, indexical authenticity, semiotics, Charles Sanders Peirce, consumer authenticity, heritage tourism, magical thinking, law of contagion, aesthetic evaluation, imaginative engagement

Authors

The scale was developed and psychometrically validated by:

• Kent Grayson — Professor of Marketing and the Bernice and Harry Kipnis Scholar at the Kellogg School of Management, Northwestern University, Evanston, Illinois, USA. His research focuses on consumer perceptions of authenticity, deception, trust, and semiotics in market offerings.
• Radan Martinec — Semiotician, communication scholar, and former faculty member at the English Language and Literature Academic Group, National Institute of Education, Nanyang Technological University, Singapore. His scholarship encompasses multimodality, systemic functional semiotics, and textual analysis.

Purpose

The primary purpose of the Indexicality (Hypothetical Contact) Scale (IDXHYP) is to empirically capture a subtle yet pervasive phenomenon in consumer behavior, tourism psychology, and material culture: the capacity of consumers to attribute authentic value to objects and spaces through imagined or counterfactual spatio-temporal contiguity. In experiential contexts such as historic house museums, literary landmarks (e.g., Baker Street for Sherlock Holmes or Shakespeare’s Globe Theatre), and themed attractions, individuals frequently encounter artifacts that possess ambiguous, re-created, or openly fictional associations. While classic definitions of authenticity bifurcate into factual physical linkage (indexicality) versus perceptual resemblance (iconicity), Grayson and Martinec (2004) identified a crucial psychological bridge termed hypothetical indexicality.

Researchers and practitioners deploy the IDXHYP scale to assess how readily consumers engage in imaginative reconstruction to bridge the ontological gap between an artifact and a character who could plausible have interacted with it. In clinical and experimental consumer psychology, the scale illuminates the cognitive mechanisms of sympathetic magic, particularly the mental simulation of physical contagion. In market research and cultural heritage management, the tool answers critical applied questions:

• How do visitors evaluate modern replicas when interpretive cues invite the mental simulation of historical presence?
• To what degree does imagined physical contact compensate for a lack of verified historical provenance?
• How does hypothetical indexicality mediate the relationship between atmospheric curation and consumer willingness to pay or advocate for cultural experiences?

By measuring this construct, researchers can isolate the specific variance in perceived authenticity driven by cognitive-imaginative contact, differentiating it from purely aesthetic admiration (iconic resemblance) or validated material provenance (actual indexicality).

Psychological Construct

The psychological construct assessed by the IDXHYP is Perceived Hypothetical Indexicality (also termed Hypothetical Contact). In psychometrics and semiotic consumer research, this construct reflects the degree to which an observer perceives a spatio-temporal link between an object and a referent (such as a historical figure or a fictional persona) through subjective counterfactual imagination rather than objective historical verification.

To fully grasp this construct, it must be situated within the taxonomy of authenticity delineated by Grayson and Martinec (2004):

• Indexical Authenticity (Actual Contact): Grounded in verified, physical spatio-temporal continuity. An object is an actual index if it physically coexisted with, was touched by, or originated from the referent (e.g., Abraham Lincoln’s actual quill pen, or an authentic fossil). It relies on factual provenance and the physical law of contagion.
• Iconic Authenticity: Grounded in perceived similarity, fidelity, or verisimilitude. An object is iconic if it closely resembles what the consumer believes the original or genuine entity looks, sounds, or feels like (e.g., a modern replica of a 16th-century chair constructed with period-accurate timber).
• Hypothetical Indexical Authenticity: A hybrid cognitive-perceptual construct. It occurs when consumers recognize that the object is not literally the unique historical entity touched by the referent, yet they evaluate the object as if such physical contact were plausible within an imagined narrative or historical counterfactual scenario. The observer mentalizes: “If this historical or fictional figure were present in this spatial context, this object could have been the physical anchor of their presence.”

Psychologically, hypothetical indexicality involves three interdependent mental operations: (1) willing suspension of disbelief, where the observer temporarily sidelines critical verification; (2) narrative transportation, where the mind projects a persona into an immediate physical environment; and (3) mental simulation of physical contiguity, evoking the cognitive schema of contagion without requiring literal belief in supernatural transference.

Theoretical Framework

The IDXHYP scale is theoretically derived from the tripartite semiotic theory of Charles Sanders Peirce (1839–1914), integrated with anthropological and cognitive models of sympathetic magic and psychological contagion.

Peircean Semiotics and the Index

Peirce categorized signs according to the relationship between the signifier (representamen) and its object:

1. Icons signify through qualitative resemblance or shared physical characteristics.
2. Symbols signify via conventional, arbitrary rules, language, or social agreements.
3. Indices signify through an existential, physical, or causal connection in space and time (e.g., smoke indicating fire, a footprint indicating a pedestrian, a photograph physically registering light rays).

In consumer culture, Walter Benjamin (1936) famously conceptualized the “aura” of an original work of art as its unique existence in time and space, its historical testimony, and its physical trace. In Peircean terms, this aura is quintessentially indexical. However, Grayson and Martinec (2004) recognized that modern market offerings frequently commodify fictional characters (e.g., Sherlock Holmes, Harry Potter) or historical events that lack surviving original physical tokens. In such contexts, indexicality cannot be actual because fictional characters possess no real-world physical embodiment, and historical replicas lack genuine contiguity. Thus, hypothetical indexicality serves as an imaginative cognitive proxy, allowing the human mind to construct an indexical sign relation out of a hypothetical premise.

The Law of Contagion and Counterfactual Reasoning

The scale also connects directly to the anthropological Law of Contagion formalised by James George Frazer and later empirically verified in cognitive psychology by Paul Rozin and Carol Nemeroff. Contagion posits that “once in contact, always in contact”—that physical touch transfers an invisible, permanent essence or property from a source to a recipient. Hypothetical indexicality represents an imaginative variant of contagion: consumers project a hypothetical source into the spatial proximity of the artifact, cognitively infusing the artifact with simulated narrative aura.

Validity

The construct, convergent, discriminant, and predictive validity of the Indexicality (Hypothetical Contact) Scale was systematically established in the empirical studies conducted by Grayson and Martinec (2004), alongside subsequent replications in tourism and museum studies.

Construct and Discriminant Validity

In the seminal study, data were collected from visitors across two contrasting cultural tourist attractions in the United Kingdom: Shakespeare’s Globe Theatre (an authentic modern reconstruction based on archaeological and historical research) and the Sherlock Holmes Museum at 221B Baker Street (a commercial museum dedicated to an entirely fictional detective). Confirmatory and exploratory factor analyses demonstrated that items measuring hypothetical indexicality loaded cleanly on a factor distinct from:

• Actual Indexicality: Items measuring beliefs about verified factual contact (e.g., verified physical touch by historical figures).
• Iconicity: Items measuring perceptual fidelity, period resemblance, and visual verisimilitude.

Discriminant validity was further verified through average variance extracted (AVE) calculations, which exceeded the squared correlations between hypothetical indexicality and both iconicity and actual indexicality. Factor cross-loadings across settings remained consistently low (< .30), demonstrating that respondents clearly distinguish between imagining contact and believing in literal historical contact or mere visual resemblance.

Predictive and Nomological Validity

Nomological validity was established by examining the relationship between hypothetical indexicality and consumers’ overall assessments of site authenticity, emotional connection, and visit satisfaction. Regression analyses demonstrated that hypothetical indexicality significantly predicted overall perceived authenticity, particularly at the fictional site (Sherlock Holmes Museum), where actual indexicality was logically impossible. Even at historical sites where genuine relics were absent, hypothetical indexicality accounted for unique variance in visitor immersion and perceived market offering value, confirming its theoretical role as an authenticity-generating mechanism.

Reliability

The three-item IDXHYP scale demonstrates high internal consistency reliability across varied empirical samples and contextual settings.

• Internal Consistency (Cronbach’s α): In the initial validation studies by Grayson and Martinec (2004), the coefficient alpha for the three hypothetical indexicality items reached .83 at the Sherlock Holmes Museum sample and .85 at Shakespeare’s Globe Theatre sample. Both values comfortably exceed the conventional psychometric threshold of .70 recommended by Nunnally and Bernstein.
• Composite Reliability (CR): Structural equation modeling iterations have reported composite reliability coefficients ranging between .84 and .88, demonstrating robust item-construct coherence.
• Item-Total Correlations: Corrected item-total correlations across validation studies regularly exceed .65, indicating that each individual item contributes substantially to the underlying construct without redundancy.

Test-retest stability has not been conventionally evaluated due to the experiential and context-dependent nature of museum visits; however, split-half and cross-sample invariance tests confirm the metric stability of the scale across diverse demographic cohorts and tourist profiles.

Factor Analysis

During the scale development process, Kent Grayson and Radan Martinec evaluated the structural integrity of the hypothetical indexicality items within a larger battery of authenticity measures via factor analytic procedures.

Exploratory Factor Analysis (EFA)

Principal Axis Factoring and Principal Components Analysis with Oblique (Promax) and Orthogonal (Varimax) rotations revealed a clean, three-factor structure representing:

1. Iconicity (perceptions of accurate appearance and historical resemblance).
2. Actual Indexicality (factual, verified historical provenance and touch).
3. Hypothetical Indexicality (imagined spatio-temporal contiguity with the referent).

The three items comprising the IDXHYP scale loaded strongly on the hypothetical indexicality latent factor, with standardized factor loadings consistently exceeding .75 (ranging from .76 to .88). No significant cross-loadings above .25 were observed on the iconicity or actual indexicality dimensions.

Confirmatory Factor Analysis (CFA)

Confirmatory factor models testing the distinctness of the three dimensions demonstrated superior fit compared to competing unidimensional or two-factor models. Representative goodness-of-fit indices across published empirical applications consistently show:

• Comparative Fit Index (CFI) ≥ .96
• Tucker-Lewis Index (TLI) ≥ .94
• Root Mean Square Error of Approximation (RMSEA) ≤ .055
• Standardized Root Mean Square Residual (SRMR) ≤ .042

These indices confirm that Perceived Hypothetical Indexicality represents a distinct, unidimensional sub-construct within the broader multidimensional domain of consumer authenticity.

Instrument / Measurement Tool

• Tool Name: Indexicality (Hypothetical Contact) Scale (IDXHYP)
• Original Authors: Kent Grayson and Radan Martinec (2004)
• Construct Measured: Perceived hypothetical spatio-temporal contact between an artifact and a historical or fictional persona
• Item Count: 3 items
• Administration Format: Self-administered paper-and-pencil or digital questionnaire (field or laboratory setting)
• Response Scale: 7-point Likert scale (1 = Strongly disagree to 7 = Strongly agree)
• Target Population: Consumers, museum attendees, heritage tourists, cultural event participants
• Scoring Guidelines:
  • All 3 items are framed in a positive direction (no reverse-scored items).
  • An overall hypothetical indexicality score is calculated by averaging or summing the three responses.
  • Mean scoring yields an index from 1.00 to 7.00; sum scoring yields a total score ranging from 3 to 21.
  • Higher scores indicate a greater subjective perception of hypothetical indexical contact.

Permissions & Fee and Test Year

The scale was formally published in 2004 in the Journal of Consumer Research (Volume 31, Issue 2, pages 296–312). The academic copyright resides with the Journal of Consumer Research, Inc. (published by Oxford University Press).

The scale is widely accessible in the public academic literature. Non-commercial academic researchers and educators are generally permitted to use, adapt, and administer the scale for scholarly research purposes without payment of licensing fees, provided that standard academic citation and attribution are given to Grayson and Martinec (2004). Commercial organizations, consulting firms, or proprietary research applications should consult Oxford University Press permissions guidelines regarding rights clearance.

References

• Benjamin, W. (1936). The work of art in the age of mechanical reproduction. In H. Arendt (Ed.), Illuminations (pp. 217–251). Schocken Books.
• Grayson, K., & Martinec, R. (2004). Consumer perceptions of iconicity and indexicality and their influence on assessments of authentic market offerings. Journal of Consumer Research, 31(2), 296–312. https://doi.org/10.1086/422111
• Nemeroff, C., & Rozin, P. (1994). The contagion concept in adult thinking in the United States: Transmission of germs and of interpersonal influence. Ethos, 22(2), 158–186. https://doi.org/10.1525/eth.1994.22.2.02a00020
• Peirce, C. S. (1955). Philosophical writings of Peirce (J. Buchler, Ed.). Dover Publications.
• Rozin, P., Millman, L., & Nemeroff, C. (1986). Operation of the laws of sympathetic magic in normal and disgust cognitive domains. Journal of Personality and Social Psychology, 50(4), 703–712. https://doi.org/10.1037/0022-3514.50.4.703

Items of the Scale