The article discusses the jury system in Spain. It mentions that the Spanish Jury law provides a number of qualifications and disqualifications for serving as a juror. It also requires that the jury provides a reasoned verdict, which could cause problems for juries because about 50% of verdicts are poorly reasoned. It notes that many cases are tried by juries because the prosecutor and defense often agree to the charge and the sentence.
Jury Selection and Jury Trial in Spain: Between Theory and Practice,
Chi.-Kent. L. Rev.
Available at: https://scholarship.kentlaw.iit.edu/cklawreview/vol86/iss2/7