Text: A 2012 field survey found wetland birds returned within a year; a 2017 model predicted slow recovery. A 2020 review blamed different flood data. Which source reported the quickest return?

Text: A 2015 lab study found the coating reduced heat loss by 18%; a 2018 factory trial saw no saving. A 2021 audit noted the trial used older machines. Which source found a clear saving?

Text: A 2010 diary study found commuters felt calmer after cycling; a 2016 GPS study measured only trip length. A 2019 review compared both. Which source reported lower stress?

Text: A 2013 classroom trial found peer marking improved revision; a 2018 survey found pupils liked it but revised no more. A 2022 paper discussed both. Which source found more revision?

Text: A 2014 housing survey found shaded flats used less air conditioning; a 2019 energy model predicted equal use. A 2021 note questioned tariff data. Which source found reduced cooling demand?

Text: Both the 2011 and 2017 river surveys found fewer insects downstream, but only the later survey linked the fall to night lighting; the earlier blamed silt. Which source gave lighting as the cause?

Text: Two reports recorded longer hospital waits. The 2014 report cited staff shortages; the 2020 report agreed waits had risen but traced them to delayed discharges. Which report blamed discharges?

Text: The 2012 and 2019 library studies both noted fewer loans. The first linked this to shorter opening hours; the second to more digital borrowing. Which study gave digital borrowing as the explanation?

Text: Both a 2016 workplace survey and a 2021 interview project found staff skipped breaks. Only the survey tied this to workload; the interviews stressed workplace culture. Which source blamed workload?

Text: A 2013 market study and a 2018 consumer panel both found falling newspaper sales. Only the panel linked the fall to distrust; the market study cited subscription prices. Which source mentioned distrust?

Text: The transport team reported bus lanes cut delays. The statistics group accepted the result but warned that holiday weeks were included. The council summarised both. Who raised the timing concern?

Text: A diet trial reported improved concentration. An ethics review did not dispute this, but noted families had selected their own meals. A funder issued both texts. Which source made the selection criticism?

Text: The 2018 app study found users walked more. A methods note accepted the increase but warned that keen walkers were over-represented. A press brief quoted both. Which source questioned the sample?

Text: A noise study found pupils near traffic scored lower. The review panel accepted the pattern but cautioned that school funding differed. The authority published both. Which source raised the funding caveat?

Text: A sleep project reported later starts improved attendance. A data audit agreed, yet warned that two rural schools had missing registers. A newsletter announced both. Which source noted missing registers?

Text: One 2015 waste project weighed bins weekly; a 2019 project used residents' online estimates. Both found similar reductions after leaflets. Which project used self-reported figures?

Text: A 2012 health project tracked steps with wrist monitors; a 2018 project asked participants to keep paper diaries. Both found activity rose. Which project used diary records?

Text: One 2014 shopping study analysed till receipts; a 2020 study interviewed households after purchase. Both found more spending on weekends. Which study used interviews?

Text: A 2016 air-quality project placed sensors on buses; a 2021 project mapped pollution from satellite data. Both identified the same hotspot. Which project collected data from moving vehicles?

Text: A 2013 reading study timed eye movements; a 2017 study tested recall after silent reading. Both found dense texts slowed readers. Which study used eye-tracking as its method?