PVA (IMAGE) Pensoft Publishers Caption An example of the gaps in collective learning: The proportion of PVA studies that found certain factors to have a strong effect on PVA results (left) does not match the proportion of PVA studies that addressed these factors (right). The authors hope that a standard protocol may aid in overcoming such mismatches. Published with courtesy of Conservation Biology journal. Credit Guy Pe'er Usage Restrictions CC-BY 3.0 License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.