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Source study found

Story checked

Forest landscapes and birdsong soundscapes have independent physical health benefits (opens in a new tab)

medicalxpress.com · 2026-09-28

Short answerEvidenceSource

Short answer

Mixed

Mixed.

2 claims go further than the study. One other point was not covered by the paper.

  • 2 supported
  • 2 overstated
  • 1 not covered

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

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Follow the evidence trail
1
2

NewsLink checks it

Mixed

Two of five claims overstate the study. Two of five check out. One claim the study doesn't address.

  • 2 supported
  • 2 overstated
  • 1 not covered
Open claim evidence
3
Source paper

Source layer

The 2 papers the story cites

Source study separated from background citations.

The research anchor for the report.

  • The study this story reportsmentioned without context

    Exposure to forests and birdsong may reduce physiological stress among college students

    Frontiers in Bird Science · 2026

    Publisher (opens in a new tab)
  • The study this story reportsmentioned without context

    10.3389/fbirs.2026.1884835/full

    Publisher (opens in a new tab)
Then inspect each claim

Evidence layer

Claim by claim

Each claim gets a verdict. Expand it to see the evidence directly below.

5 claims in this story

Showing all 5 claimsChoose a verdict to focus the list.

Claim 1 of 5OverstatedThe article says birdsong could reduce stress in urban areas and forest exposure could reduce stress even when traffic noise is present.View evidenceHide evidence

Why this verdict

The abstract supports independent main effects and reports no significant soundscape × landscape interaction, but it does not provide stratum-specific estimates proving that birdsong reduces stress specifically in urban/gray settings or that forest exposure reduces stress specifically under traffic-noise conditions. The story’s applied causal interpretation outruns the abstract-level evidence.

1

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space.b = 0.65, p = 0.007

“We engaged 95 participants from North Carolina State University in a randomized, four-treatment, within-subjects design…”
2

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space in linear mixed models adjusting for repeated measures, soundscape, interaction, age, and gender.b = 0.65, p = 0.007

“We modeled HR and HRV using linear mixed models with a random intercept to account for participant effects and fixed effects for soundscape, landscape, their interaction, age, and gender.”
Claim 2 of 5OverstatedThe paper concludes that forested landscapes and birdsong each had independent, positive effects on well-being, suggesting urban planners have more options for stress-reducing spaces.View evidenceHide evidence

Why this verdict

The abstract-level profile supports independent positive effects on physiological stress markers—lower HR for forest exposure and higher HRV for birdsong—and discussion of green infrastructure on college campuses. However, the story broadens this to 'well-being' and urban-planning options despite the abstract-profile limitations: single university sample, short exposures, and cardiovascular outcomes only. The urban-planning implication is plausible but broader than the supplied abstract evidence.

1

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space.b = 0.65, p = 0.007

“We engaged 95 participants from North Carolina State University in a randomized, four-treatment, within-subjects design…”
2

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space in linear mixed models adjusting for repeated measures, soundscape, interaction, age, and gender.b = 0.65, p = 0.007

“We modeled HR and HRV using linear mixed models with a random intercept to account for participant effects and fixed effects for soundscape, landscape, their interaction, age, and gender.”
Claim 3 of 5Not coveredThe study, led by North Carolina State University researchers, used heart-rate monitors to measure how different sounds and landscapes affected physiological stress.View evidenceHide evidence

Why this verdict

The abstract profile supports that the study measured HR and HRV/RMSSD during different landscape and soundscape exposures, but it does not verify the specific instrumentation as 'heart-rate monitors'; sensor specifics are explicitly unavailable at abstract depth. The general design is supported, but the device-level claim is not verifiable from the supplied abstract-level profile.

1

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space.b = 0.65, p = 0.007

“We engaged 95 participants from North Carolina State University in a randomized, four-treatment, within-subjects design…”
Claim 4 of 5SupportedA new study found that exposure to birdsong soundscapes or forest landscapes reduces physiological stress.View evidenceHide evidence

Why this verdict

The abstract-profile evidence describes a randomized within-subject outdoor experiment manipulating landscape and soundscape exposures, with forest exposure associated with reduced heart rate and birdsong associated with increased HRV, both framed as physiological-stress outcomes. Because the exposure was experimentally assigned, the story’s causal framing is reasonably supported for short-term physiological measures.

1

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space.b = 0.65, p = 0.007

“We engaged 95 participants from North Carolina State University in a randomized, four-treatment, within-subjects design…”
Claim 5 of 5SupportedSpending time in a forest landscape reduced heart rate relative to an urban landscape, and listening to birdsong increased heart rate variability relative to traffic sounds.View evidenceHide evidence

Why this verdict

The paper profile reports that forest exposure was associated with reduced heart rate relative to gray space and that birdsong exposure was associated with increased HRV/RMSSD relative to traffic noise. These are the central reported results from the randomized within-subject experiment and mixed-model analysis.

1

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space.b = 0.65, p = 0.007

“We engaged 95 participants from North Carolina State University in a randomized, four-treatment, within-subjects design…”
2

Study evidence

Forest exposure was associated with reduced heart rate relative to gray space in linear mixed models adjusting for repeated measures, soundscape, interaction, age, and gender.b = 0.65, p = 0.007

“We modeled HR and HRV using linear mixed models with a random intercept to account for participant effects and fixed effects for soundscape, landscape, their interaction, age, and gender.”
Then look for missing context

Context layer

What the story left out

Important study details the story did not include.

  • Randomized within-subject outdoor experiment with 95 North Carolina State University college-student participants.

    The story reflects the North Carolina State connection and experimental exposure comparison, but it does not mention the N=95 college-student sample or the within-subject randomized crossover design, both of which matter for interpreting scope and generalizability.

    From randomized within-subject crossover

  • Generalizability limitation: participants came from a single college population at North Carolina State University.

    The story frames implications for urban planners and urban areas but does not acknowledge that the abstract-level evidence comes from one university college-student sample.

    From randomized within-subject crossover

  • Exposure-duration limitation: the reported protocol involved short exposures, including 5 minutes of silent control followed by 10 minutes of playback.

    The story does not mention the short-term nature of the exposure protocol, which is important for interpreting claims about stress reduction in real-world urban settings.

    From randomized within-subject crossover

  • Outcome-scope limitation: the abstract reports cardiovascular measures only, not broader mental-health or well-being outcomes.

    The story uses broader well-being language and connects the findings to mental-health-related planning implications, but it does not acknowledge that the supplied abstract-level evidence is limited to HR and HRV/RMSSD.

    From randomized within-subject crossover; linear mixed-effects modeling (within-subjects, random intercept)

4 things the story did carry across
  • Crossed exposures: forest versus gray/urban space and recorded birdsong versus recorded traffic noise.
  • Primary outcomes were cardiovascular physiological-stress measures: heart rate and HRV/RMSSD.
  • Main results: forest exposure was associated with reduced heart rate, and birdsong exposure was associated with increased HRV relative to traffic noise.
  • No significant soundscape × landscape interaction was detected for HR or HRV.
Then read the study layer

Study layer

Study at a glance

Scan the study first. Expand only the parts you want to inspect.

Pieces of work

2

Evidence read

study summary

Lead result

human in vivo

1Lead resulthuman in vivoTest whether exposure to forest (vs gray space) and birdsong (vs traffic noise) have independent and potentially additive effects on college students’ physiological stress (HR and HRV) in an outdoor, randomized within-subject experiment.randomized within-subject crossoverExpand

In plain English

Randomized, within-subject outdoor crossover (N=95 college students) testing independent and additive effects of landscape (forest vs gray space) and soundscape (recorded birdsong vs recorded traffic) on physiological stress (heart rate, HRV/RMSSD). Forest exposure was associated with reduced heart rate and birdsong exposure with increased HRV; no significant soundscape × landscape interaction was detected.

Key findings

  • Forest exposure was associated with reduced heart rate relative to gray space.b = 0.65, p = 0.007
  • Birdsong exposure was associated with increased heart rate variability (RMSSD) relative to traffic noise.b = -1.38, p = 0.049
“We engaged 95 participants from North Carolina State University in a randomized, four-treatment, within-subjects design…”
What this piece can’t prove
  • Sample drawn from a single college population (North Carolina State University), limiting generalizability.
  • Short exposure durations (5 min silent control; 10 min playback) as reported in abstract.
  • Outcomes limited to cardiovascular measures (HR and HRV/RMSSD); broader mental-health outcomes not reported in abstract.

1 further detail could not be confirmed from the summary.

2secondary dataModel and quantify the effects (main effects and interaction) of landscape and soundscape on HR and HRV while accounting for participant-level correlation and covariates (age, gender) using linear mixed models.linear mixed-effects modeling (within-subjects, random intercept)Expand

In plain English

The authors analyzed repeated-measures data from a randomized, within-subjects, four-treatment outdoor experiment (95 participants) using linear mixed-effects models with a participant-level random intercept and fixed effects for landscape (forest vs. gray space), soundscape (birdsong vs. traffic), their interaction, age, and gender, to estimate effects on heart rate (HR) and heart rate variability (HRV, RMSSD). Reported results from these models: forest exposure was associated with reduced HR (b = 0.65, p = 0.007); birdsong exposure was associated with increased HRV relative to traffic (b = -1.38, p = 0.049); the soundscape × landscape interaction was not significant for either outcome (all p > 0.16).

Key findings

  • Forest exposure was associated with reduced heart rate relative to gray space in linear mixed models adjusting for repeated measures, soundscape, interaction, age, and gender.b = 0.65, p = 0.007
  • Birdsong exposure was associated with increased HRV (RMSSD) relative to traffic noise in the reported linear mixed models.b = -1.38, p = 0.049
“We modeled HR and HRV using linear mixed models with a random intercept to account for participant effects and fixed effects for soundscape, landscape, their interaction, age, and gender.”
What this piece can’t prove
  • Abstract does not report how baseline (silent control) measurements were incorporated into the models or whether multiple comparisons were addressed.

2 further details could not be confirmed from the summary.

Finally, the search trail

Method layer

NewsLink found the paper. Tessa takes you deeper.

NewsLink checks the story. Tessa is where you inspect the paper, authors, evidence, and research context.

Open the paper in Tessa

Exposure to forests and birdsong may reduce physiological stress among college students

Frontiers in Bird Science · 2026

Source record (opens in a new tab)

Why this one

Near certain

NewsLink found the paper. Tessa is where you inspect it deeply.

Papers considered

The selected paper, plus nearby candidates.

Crossref, PubMed, Europe PMC · 16 candidate papers

Selected

Exposure to forests and birdsong may reduce physiological stress among college students

Frontiers in Bird Science · 2026 · Crossref

Source (opens in a new tab)
Candidate

Effect of Stress on Heart Rate Variability during Examination among MBBS Students

International Journal of Science and Research (IJSR) · 2021 · Crossref

Source (opens in a new tab)

And 10 more candidates considered.