Act as an expert in academic communication and scientific poster design. Based on the provided document regarding the study "Comparing Physical Literacy Profiles in Children from Spain and England": 1. Generate all output strictly in English. 2. Create an executive summary with concise bullet points tailored for a 4-column academic poster (DIN-A0 slide in ppt). 3. Structure the poster content into 4 clear quadrants: (1) Background & Objectives, (2) Methodology & Sample, (3) Key Results (highlighting model fit indices like BIC, Entropy, APC, and class distributions for England and Spain. Keep empty space to paste two figures), and (4) Conclusions & Practical Implications. The text I suggest for the poster is that reported in the attached file with the abstract