Philosophies of Human Nature Scale

Abstract

The Philosophies of Human Nature Scale (PHNS), developed by Lawrence S. Wrightsman in 1964, is a psychological instrument designed to measure fundamental personality traits related to an individual’s generalized view of human nature, particularly concerning trust. The scale assesses six critical components: Trustworthiness, Altruism, Independence, Strength of Will and Rationality, Complexity, and Variability. Initially comprising 20 Likert-type items per component, the instrument was refined through two stages of item analysis, resulting in a final form featuring 14 items per subscale. Psychometric evaluations demonstrated that the scale possesses adequate internal consistency and strong temporal stability. A key finding regarding its structure is that the first four components (Trustworthiness, Altruism, Independence, and Strength of Will and Rationality) were significantly intercorrelated, while the last two dimensions (Complexity and Variability) were found to be statistically independent of the first four.

Keywords

Philosophies of Human Nature Scale, Psychometric Properties, Test Development, Trustworthiness Subscale, Altruism Subscale, Independence, Strength of Will and Rationality Subscale, Complexity Subscale, Variability Subscale, Human Nature, Trust, Personality.

Authors

Wrightsman, Lawrence S.

Purpose

The primary purpose of the Philosophies of Human Nature Scale is to provide a standardized, quantifiable method for measuring an individual’s underlying assumptions and beliefs regarding the fundamental characteristics of human nature. Specifically, the scale was constructed to measure stable personality traits and their direct relation to the concept of trust in others.

By breaking down the broad concept of human nature into six distinct philosophical components, the instrument allows researchers to study nuanced differences in worldview and how these beliefs impact social cognition, interpersonal behavior, and attitudes toward society.

Construct

The PHNS measures the overarching psychological construct of Human Nature, which encompasses an individual’s philosophy regarding the morality, reliability, and predictability of people in general. This construct is operationalized through six specific, though partially correlated, dimensions:

• Trustworthiness: The belief in the honesty and reliability of others.
• Altruism: The belief concerning the extent to which people are genuinely selfless and motivated by concern for others.
• Independence: The belief regarding the ability of people to resist external social pressures and exercise autonomy.
• Strength of Will and Rationality: The belief concerning the capacity of people to act logically and control their impulses.
• Complexity: The belief regarding the inherent psychological depth and intricacy of the human mind.
• Variability: The belief concerning the consistency or fluctuation of human behavior across time and situations.

Validity

Evidence for the validity of the Philosophies of Human Nature Scale is derived from the demonstrated relationships between its subscales, aligning with the author’s theoretical hypotheses. Specifically, construct validity was supported by the finding that the first four components—Trustworthiness, Altruism, Independence, and Strength of Will and Rationality—were observed to be statistically intercorrelated.

This intercorrelation suggests that these four constructs share a common underlying dimension, likely representing a generalized positive or optimistic view of humanity. Furthermore, the remaining two components, Complexity and Variability, were confirmed to be independent of the first four factors, successfully validating the six-dimensional structure designed to capture distinct aspects of an individual’s philosophy of human nature.

Reliability

The reliability of the PHNS was established through rigorous psychometric testing. The six subscales (Trustworthiness, Altruism, Independence, Strength of Will and Rationality, Complexity, and Variability) all demonstrated adequate internal consistency, which confirms that the items within each respective subscale are highly correlated and measure the same construct reliably.

In addition to internal consistency, the scale exhibited strong consistency over time. This high temporal stability indicates that the PHNS is effective in measuring enduring personality traits or stable philosophical orientations, making it a reliable tool for longitudinal research in adult populations.

Factor Analysis

The source documentation does not provide details of a formal factor analysis (e.g., specific factor loadings or variance explained). However, the scale was developed using two intensive rounds of item analysis, which served to isolate and refine the six hypothesized dimensions. The subsequent empirical finding that the first four components were intercorrelated while the last two remained independent functions as crucial structural evidence supporting the scale’s intended six-factor model.

Instrument

Test Type: Rating Scale

Format: Items are presented in a statement format, and responses are collected using a Likert-type scale, typically requiring respondents to indicate their degree of agreement or disagreement.

Language Available: English

Population Group: Human; Male; Female

Age Group: Adulthood (18 yrs & older)

Population Details: The initial psychometric validation and development sample consisted primarily of Undergraduates.

Test Methodology: The scale is designed for paper administration.

Keywords

Human Nature; Philosophies; Test Construction; Test Reliability; Test Validity; Likert-type items; Personality; Trustworthiness; Psychometrics.

Authors

Author ORCID Identifier: Not provided in source content.

Affiliation Email addresses: Not provided in source content.

Correspondence Address: Not provided in source content.

Permissions & Fee and Test Year

The Philosophies of Human Nature Scale was first published and validated in 1964. The instrument is categorized as non-commercial, and no fee is generally required for its use in academic settings. However, researchers seeking to utilize the complete set of test items must note that the items are not publicly available. It is necessary to contact the author, Lawrence S. Wrightsman, or the original publisher to obtain the current version of the scale and verify permission requirements.

Reference’s

• Wrightsman, L. S., Jr. (1964). Measurement of philosophies of human nature. Psychological Reports, 14(3), 743–751. The official source can be accessed via DOI: https://doi.org/10.2466/pr0.1964.14.3.743

Items of the Philosophies of Human Nature Scale

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The specific test items for the Philosophies of Human Nature Scale are not available in the provided source content. Researchers must contact the author or publisher for obtaining the complete set of 84 test items (14 items across six subscales).