What are the key factors influencing changes in consumer attitudes towards microplastics across different demographic groups?

Key factors influencing consumer attitudes toward microplastics include environmental and health consciousness, demographic characteristics (gender, age, education level), and social-cultural elements such as media narratives, collectivist values, and national policy.

Abstract

Studies indicate that consumer attitudes toward microplastics are chiefly influenced by environmental and health consciousness. Many papers report that clearer knowledge and greater awareness of microplastic risks increase concerns about both personal health and the environment, which in turn boost consumers’ willingness to change their practices. A number of studies note that women typically express higher levels of concern and are more likely to adopt pro‐environmental behaviors than men; likewise, younger and more educated individuals tend to demonstrate stronger positive attitudes and intentions compared with older or less educated groups.

Several papers also point to social and cultural factors—including media narratives, collectivist values, and the influence of national policy—that shape these attitudes. One study reported that 88.7% of participants were willing to adopt new practices and another noted that 94.6% supported policy measures, though many studies also record a gap between stated willingness and actual behavior change. Collectively, the evidence supports the view that more robust awareness, clearer communication of risks, and interventions tailored to demographic and cultural contexts are associated with shifts in consumer attitudes toward microplastics.

Methods

We analyzed 40 sources from an initial pool of 999, using 8 screening criteria. Each paper was reviewed for 5 key aspects that mattered most to the research question.

Screening

We screened in sources based on their abstracts that met these criteria:

• Microplastics Focus: Does this study examine consumer attitudes, perceptions, or behaviors specifically related to microplastics (not just general plastic pollution)?
• Attitude Change or Formation: Does this study measure attitude change over time OR examine factors associated with attitude formation/modification?
• Demographic Analysis: Does this study include demographic analysis or stratification of results by demographic characteristics?
• Study Design: Is this a quantitative, qualitative, or mixed-methods primary research study, OR a systematic review/meta-analysis?
• Adult Population: Does this study involve adult consumers (18+ years) as participants?
• Attitude Components: Does this study include attitude components (evaluative or emotional responses), not solely knowledge or awareness measures?
• Publication Type: Is this a peer-reviewed publication (not a conference abstract, editorial, opinion piece, or non-peer reviewed material)?
• Consumer Perspective: Does this study include consumer data or perspectives (not exclusively expert opinions, industry stakeholders, or policymakers without consumer input)?

We considered all screening questions together and made a holistic judgement about whether to screen in each paper.

Data extraction

We asked a large language model to extract each data column below from each paper.

• Study Design Type: Identify the primary research design used in the study. Look in the methods section for explicit description of the study type.
• Sampling Method: Locate the sampling technique in the methods section. Specifically extract:
  • Sampling technique (e.g., snowball, convenience, random, stratified)
  • Total sample size
  • Sampling location/context
• Demographic Composition: Extract demographic information about study participants, focusing on:
  • Age range/distribution
  • Gender breakdown
  • Occupation categories
  • Geographic location/region
• Key Factors Influencing Microplastic Attitudes: Systematically extract factors identified as influencing consumer attitudes towards microplastics.
• Consumer Behavioral Intentions: Extract specific details about consumer behavioral intentions related to microplastics:
  • Percentage willing to reduce microplastic usage
  • Specific behavioral change intentions
  • Barriers to behavioral change
  • Supportiveness of policy interventions

Results

Characteristics of Included Studies

Thematic Analysis

Environmental and Health Consciousness as Primary Drivers

• Many included studies report that environmental and health consciousness are central factors influencing consumer attitudes towards microplastics.

Gender-Based Differences in Attitude Formation and Response

• Many studies report that women show higher levels of concern, knowledge, and willingness to act on microplastic issues.

Knowledge and Awareness Gaps Across Demographic Groups

• Despite generally high levels of concern, many studies identify significant gaps in knowledge and awareness.

Social and Cultural Influences on Attitude Change

• Social and cultural factors, including collectivist values, peer influence, and national context.

Behavioral Intention Translation Across Demographics

• While stated willingness to act is often high, actual behavior change is less consistent, with intention-behavior gaps frequently reported.