Ejercicios de comprensión auditiva: datos de una biblioteca
11 preguntas · opción múltiple y verdadero o falso · corrección al instante
Transcripción (mejor después de responder)
- Professor Ellis Let me begin with a fictional library, because an invented example can reveal a very real habit of thought. The library introduces self-service machines, and the average waiting time at the desk falls from twelve minutes to four. The annual report calls this a dramatic improvement. On the measure selected, it plainly is. The interesting question is what that measure has allowed to disappear.
- Professor Ellis Suppose that confident users now borrow books without assistance, while visitors who struggle with the machines simply leave. Neither group joins the queue. A shorter wait may therefore reflect successful independence, unmet need, or some combination of the two. My point is not that the machines have failed. We don't yet have the information needed to decide. The same number is compatible with quite different accounts of what happened.
- Professor Ellis You might respond that we should survey the people at the desk. Certainly, but notice who would still be missing: those who never reached it. Interviewing satisfied users more thoroughly does not somehow recover the experience of absent users. We would need other approaches, perhaps conversations with local groups or observation near the entrance. These methods have their own weaknesses. They are useful because they expose a different part of the problem, not because they offer an unfiltered view of reality.
- Professor Ellis There is also a question of timing. An early increase in requests for help could mean the system is confusing. Equally, it could mean people who previously avoided the library are beginning to use it. Treating every request for assistance as a cost to be eliminated would encourage staff to discourage precisely the visitors a public service ought to welcome. An apparently neutral target can quietly become an instruction about whose needs deserve attention.
- Professor Ellis Please don't take this as an invitation to abandon targets and trust a manager's intuition. That would merely replace visible assumptions with less visible ones. Numbers make patterns discussable and can challenge comforting stories about how well we are doing. But a target should initiate an inquiry rather than settle it. We should ask what behavior it rewards, who is excluded from its denominator, and what would count as evidence against our preferred interpretation.
- Professor Ellis For your assignment, then, choose one indicator used by a public institution. Don't design the perfect replacement; that is a tempting way of avoiding the difficulty. Instead, propose a second source of evidence that could make the first result harder to interpret. If your additional evidence only confirms what the institution already wants to announce, ask whether you have tested the claim or merely decorated it.
Opción múltiple
Sigue el argumento
Selecciona la interpretación mejor sustentada por la conferencia.
Why does the lecturer introduce the library example?
What is her position on the fall in waiting time?
Why would surveying only people at the desk be insufficient?
What risk does she associate with minimizing requests for help?
Why does she reject relying solely on managerial intuition?
What does the contrast between testing and decorating a claim imply?
Verdadero o falso
Delimita las conclusiones
Indica si cada afirmación refleja el argumento; presta atención a las reservas y concesiones.
The lecturer accepts that the selected waiting-time measure improved.
She presents observation near the entrance as free from methodological weaknesses.
More requests for help might signal that previously absent users are attending.
She believes numerical measures can challenge reassuring institutional narratives.
The assignment requires students to design a flawless replacement indicator.
Pistas para el audio
Estrategia de escucha
Reconstruye la función de cada ejemplo: planteamiento, objeción, concesión y consecuencia. No necesitas retener cada palabra para reconocer cómo se limita una conclusión.
Una concesión como on that measure restringe el alcance de lo que se acepta; escucha qué queda fuera de esa aceptación.
Vocabulario útil
- Unmet need: necesidad no atendida.
- Compatible with: compatible con.
- Denominator: denominador; aquí, la población incluida en una medida.
- Settle an inquiry: dar por resuelta una investigación o cuestión.
- Preferred interpretation: interpretación que se tiende a favorecer.